The Burning Bridge
The Burning Bridge
A pair of adventurers is hired by a desperate village elder to retrieve a stolen artifact from a duergar war band before the enemy uses it to collapse the only bridge connecting the village to safety. The party must infiltrate a mountain stronghold, outwit cunning dwarven warriors, and confront the duergar captain before the ritual is complete.
Read Aloud
You arrive in Thornford just as dusk paints the sky crimson. The village clings to the mountainside like a stubborn child to their mother, connected to the outside world by a single stone bridge that arcs across a yawning chasm. The acrid smell of burnt wood stings your nostrils—smoke still curls from the western granary. Villagers hurry past with hollow eyes, and the sound of a child crying echoes from one of the thatched houses. An elderly woman with silver hair and a walking stick approaches you, her face etched with desperate hope.
Description
Thornford is a modest farming village of approximately 200 souls, nestled in the foothills of the Sword Mountains. The architecture is practical stone and timber, with a small stone garrison house that serves as militia barracks. The sole entrance to the village is the Bridge of Aldermere, a two-hundred-foot arch of stone built centuries ago by dwarven masons. A recent duergar raid has left the village shaken: three buildings damaged, three villagers dead, and the sacred Heartstone Amulet—an artifact that magically reinforces the bridge—stolen. Without the amulet, the bridge will weaken significantly within 48 hours. The village militia is too poorly equipped to mount a rescue mission into the mountains. Elder Nissa Thornbrook, who leads the village, has sought outside aid and will pay handsomely for the artifact's return.
DM Notes
This is an introduction scene. Allow the party to gather information and accept the quest. Key NPCs to introduce: Elder Nissa Thornbrook (quest giver), and optionally the militia captain Gareth Ironmantle (who can provide tactical information). DC 12 Insight check reveals Elder Nissa is hiding something—she knows the duergar captain, Karathak Ironbinder, personally (they were childhood neighbors in the Deep Roads before her family fled to the surface). This detail may be leveraged by a clever party in negotiation or deception later. The bridge mechanics: each hour without the amulet, 1d6 villagers experience tremors; if the bridge collapses, the village is cut off. Create urgency: the duergar will perform a ritual to permanently shatter the bridge in 8 hours (party has until nightfall). A successful DC 14 Intelligence (Arcana) check or conversation with Elder Nissa reveals the amulet glows with faint blue light and is roughly the size of a clenched fist. The party may also learn that the duergar stronghold, Ironpeak Hold, is a 4-hour climb up the mountain pass.
Read Aloud
The mountain trail rises steeply before you, switchbacking through pine forest that grows thinner as altitude increases. The air thins and sharpens with cold. After two hours of climbing, you notice something that makes your skin prickle: the trail is marked with duergar runes—claims of dominion—carved fresh into boulders. The last marker, still wet with pitch, points toward a narrow canyon ahead. As you crest a ridge, you spot movement below: two duergar scouts in gray armor are posted at the canyon mouth, one checking a crude map, the other sharpening a hand axe. Neither has noticed you yet. The path offers cover—tumbled rocks, scrub brush—but approaching undetected will require care.
Description
The approach to Ironpeak Hold follows the only viable mountain pass. The terrain is rocky and exposed at higher elevations, with patches of pine forest below the treeline. The duergar have stationed two scouts at a natural choke point in a canyon. The scouts are alert but not expecting trouble (the village militia poses no threat). The canyon beyond is 100 feet long and narrows to 30 feet at its widest. A successful DC 13 Dexterity (Stealth) check allows a character to approach within 30 feet unseen. A failed check alerts the scouts to hostile activity nearby. The party may also attempt to bypass the canyon by climbing the steep cliff faces (DC 15 Strength (Athletics) check for each character; success allows passage, failure costs 1 hour and 1d4 fall damage if below DC 10). Beyond the canyon is the final 30-minute ascent to Ironpeak Hold itself.
DM Notes
This is a scout encounter designed to give the two-person party options. If they engage the scouts in combat, it should be relatively quick (scouts have low HP). If they avoid combat, they demonstrate intelligence and preserve resources for tougher fights ahead. The two duergar scouts (Duergar, CR 1 each) have 26 HP, AC 16. They carry hand axes and will attempt to flee toward the stronghold if reduced below 10 HP, triggering an alarm. If alerted before combat, the duergar will sound a war horn (audible 1 mile away), giving the stronghold 10 minutes warning. Encourage non-combat solutions: disguising equipment, hiding nearby and moving at night, diplomacy (Charisma DC 16 Deception or Persuasion). A barbarian may simply want to charge; that's tactically viable but loud. Adjust monster stats or enemy morale based on party approach.
Read Aloud
The stronghold emerges from the mountainside as if the stone itself has been hollowed into a fortress. Three towers of dark granite rise from the rocky peak, connected by a high stone wall. A heavy ironbound gate dominates the main entrance, and banner-holes for crimson-and-silver pennants frame the archway. Smoke curls from a chimney deep within. The masonry shows signs of age and repair—scars of old battles. A single stone courtyard visible through the gate holds a massive forge, still glowing red with heat. The sound of hammering echoes distantly. You count perhaps fifteen duergar visible at various posts: guards on the walls, workers near the forge. Security is tight but not paranoid—they believe themselves safe in their mountain fastness.
Description
Ironpeak Hold is a duergar military stronghold built into a granite peak. The main structure has three levels: the courtyard (ground level, where the forge and stores are), the barracks and war room (first floor above ground), and the commander's quarters and ritual chamber (top level). The stolen Heartstone Amulet is being held in the ritual chamber, currently guarded by a single duergar stone guard (an animated armor variant) under the command of Captain Karathak Ironbinder. The party must navigate the fortress without raising a full alarm if possible—a general alert would bring the full garrison (approximately 25 duergar warriors, too many for a two-person party to handle). The gate is locked (DC 16 Strength check to break, DC 15 Dexterity check with thieves' tools to pick). The walls are 20 feet high and unguarded from the inside courtyard (the guards walk the exterior parapets). A small postern gate on the north wall (not visible from the main approach) offers another entry point but is barred from within (DC 13 Strength to break the bar). Inside the hold, narrow corridors wind through the carved stone. Visibility is limited (10-foot torch light in most areas). The forge courtyard has excellent light and is constantly staffed by 3-4 workers. The barracks (second level) house 15 warriors; most are asleep during evening hours. The war room and ritual chamber are on the third level, accessible by a steep stone staircase guarded by two duergar sentries during the day (they post single guards at night).
DM Notes
This is the centerpiece exploration and infiltration challenge. Use dynamic descriptions of the duergar architecture: the smell of sulphur and iron, the sound of the forge, the cold stone echoing footsteps. The party should have multiple approaches: direct combat (high risk, high reward in terms of speed), stealth (low risk if successful, slow), or a hybrid (hit one group hard to distract, slip through in chaos). Duergar have Enlarge ability (bonus action, 1 minute duration, +1 damage rolls, advantage on Strength checks/saves). They see in darkness 120 feet. Present skill check opportunities: DC 12 Perception to notice a servant staircase, DC 13 Deception to bluff guards if disguised, DC 14 Stealth to move through the barracks without waking warriors. If the party triggers a general alarm, the encounter becomes Deadly; otherwise, design combat encounters as Medium difficulty. Suggest to players: a two-person party gains advantage from surprise and elite positioning. Encourage creative tactics: using the forge's heat as cover, triggering a structural collapse, poisoning a water supply, negotiating with sympathetic workers. The end goal is to reach the ritual chamber, defeat or bypass Karathak, retrieve the amulet, and escape.
Read Aloud
The chamber is a high-ceilinged circular room carved from living stone, its walls inscribed with duergar runes that seem to writhe in torchlight. At the chamber's center stands an iron altar, and hovering three feet above it—suspended in a cage of shimmering magical force—is the Heartstone Amulet. Its surface pulses with soft blue light, pulsing like a heartbeat. The amulet is beautiful and terrible: clearly ancient, clearly powerful. Standing before the altar is a duergar warrior of commanding presence: scarred face, eyes like iron, wearing plate armor engraved with symbols of rank. This is Captain Karathak Ironbinder. He does not seem surprised to see you. A thin smile crosses his scarred face. "Interesting. The surface dwellers send warriors to stand against the under-kingdom. Elder Nissa should have known better than to defy her own people." His voice is rough as grinding stone. The chamber's pillars are thick—good cover. Behind Karathak, a stone statue stands motionless, its blank eyes fixed on the altar.
Description
The ritual chamber is 40 feet across and 20 feet high. Six pillars support the ceiling (each pillar is 5 feet in diameter, excellent for cover). The iron altar is at the center, with the magical force cage suspended above it. Karathak stands before the altar. The stone statue (an Animated Armor construct, detailed in the encounter below) flanks him on the right. The force cage is magical and difficult to break: AC 18, HP 25. Dispelling it requires a successful DC 15 Dispel Magic or Antimagic Field. However, destroying or damaging the cage triggers a loud magical discharge (heard throughout the hold, bringing reinforcements in 2 rounds). If the amulet is removed from the cage, alarms sound, but Karathak will not stop the party if cornered—he will attempt to flee with the knowledge that the ritual is incomplete. The ritual itself (if completed) will permanently shatter the bridge. It requires 3 full rounds of uninterrupted casting by Karathak. The party has 12 hours of total time, but only 4 hours remain before the ritual would have been completed by default (this creates pressure). If the party enters the chamber, Karathak will immediately begin casting the ritual unless they initiate combat.
DM Notes
This is the climactic encounter. Karathak is dangerous but not unbeatable for a two-person party of level 5 adventurers. He is proud and will fight rather than flee initially; however, if reduced to below 20 HP, he will surrender and offer information (he can tell the party more about Elder Nissa's past, the duergar politics, and safe passage if spared). The combat should feel epic but winnable. Use the pillars to create dynamic positioning. The Animated Armor statue is a minion to make action economy more threatening. Allow the party to attempt interrupting the ritual (Counterspell from a wizard would work, but the party is all barbarians—they'll need to damage Karathak enough to break concentration or prevent him from casting). If things go poorly, the party can grab the amulet and run; pursuing duergar will give chase but won't venture far from the stronghold (3 rounds of pursuit, then they give up). Encourage roleplay: Karathak knows Elder Nissa and may speak to her if she were present. The party can choose mercy or vengeance. Present this as a moment of choice that affects the story's conclusion.
Monsters
Tactics
Karathak fights with the discipline of a veteran commander. On his first turn, he will begin casting the bridge-collapse ritual (requires concentration), consuming his action. The Animated Armor (stone statue that comes to life) will engage the party directly, using its Slam attacks to tie up melee fighters. On subsequent turns, Karathak will maintain concentration on the ritual if the party is not attacking him directly (damage breaks concentration on a DC 10 + damage taken check). If the party damages Karathak, he will abandon the ritual and fight offensively. He will use Enlarge as a bonus action on his second turn (assuming he's still concentrating on the ritual). If Karathak is reduced to 20 HP or fewer, he will cease combat and attempt to flee toward the chamber exit, abandoning the amulet. The Animated Armor will continue attacking until destroyed (it does not have self-preservation instinct). Karathak may use Invisibility to reposition or escape if cornered.
Terrain
The 40-foot-diameter circular chamber features six pillars (5 feet in diameter each) providing cover. The iron altar is at the center, with the magical force cage suspended 3 feet above it. The floor is smooth stone, offering no difficult terrain. Pillars are spaced roughly 15 feet apart. The chamber entrance is a 10-foot-wide doorway on the south wall. Torch sconces line the walls at 10-foot intervals, providing bright light throughout. The ceiling is 20 feet high, limiting aerial tactics.
A platinum pendant set with a deep blue gemstone (sapphire or magical crystal). The amulet is warm to the touch and pulses with faint blue light. Its primary function is to reinforce the Bridge of Aldermere through sympathetic magic—when worn, the wearer can sense the bridge's structural integrity within 1 mile. The amulet has additional value: if worn, it grants advantage on saving throws against cold damage (duergar enchantment against the surface world's harsh climate). The artifact is worth 500 gold pieces to a collector, but its true value to Thornford is irreplaceable. It must be returned to the village within 4 hours, or the bridge will begin to weaken. Once returned and placed on the village's altar, the bridge is fully restored.
A masterwork warhammer of blackened steel with a head that bears ancient duergar runes. This is a +1 warhammer that deals an additional 1d6 cold damage on a hit. Karathak's personal weapon, imbued with magic to channel the winter of the deep earth. Value: 450 gold pieces if sold to the right buyer (a duergar merchant or dwarven armorer). A barbarian wielding this weapon gains +1 to attack and damage rolls, and cold resistance.
An iron ring set with a small garnet, marked with Karathak's personal seal (a war pick crowned with a mountain). This ring is a symbol of rank among the duergar military. If presented to a duergar authority, it grants safe passage through duergar territories for one journey. Value: 200 gold pieces as a curiosity; invaluable for political leverage with the duergar empire.
Karathak carried 47 gold pieces, 120 silver pieces, and a small pouch containing three cut rubies (50 gold pieces each). Total additional value: 397 gold pieces. Karathak also wore a platinum locket containing a miniature portrait of a duergar woman (his sister, now deceased). The locket is priceless to Karathak's family but has no monetary value to outsiders—though returning it to the duergar empire could earn significant political goodwill.
Conclusion
Wrap Up
The party returns to Thornford with the Heartstone Amulet in hand. Elder Nissa weeps with relief as the artifact is placed upon the village's altar—immediately, a soft hum emanates from the stone, and the Bridge of Aldermere glows with renewed strength. The tremors cease. Villagers emerge from their homes to greet the heroes with gratitude and cheers. A feast is prepared that evening. Nissa pays the promised gold and offers the party lodging for as long as they wish. If Karathak was slain, she offers an additional 100 gold pieces and seems to finally find peace—the shadow of her past lifted. If Karathak was spared, she becomes withdrawn and frightened, constantly watching the mountain passes, though she still honors her debt.
Cliffhanger
Three days after the party's victory, a duergar emissary arrives at the village gates—not as a raider, but as a diplomat. He carries a sealed letter bearing Karathak's personal seal. The letter is addressed to the party: "You have proven yourselves warriors of honor. The under-kingdom does not forget those who best us in fair combat. I propose an alliance. The surface world is threatened by something worse than duergar greed: rumors speak of a mind flayer enclave establishing itself in the Underdark beneath the Sword Mountains. If this cancer spreads, both our peoples will suffer. Meet me at the Blackstone Covenant ruins in two weeks, and we shall discuss terms. Bring proof that you will negotiate in good faith—bring something precious to your people. —Karathak Ironbinder, Captain of Ironpeak Hold."
Next Session Hooks
- The duergar diplomatic mission raises questions: Is Karathak genuinely seeking alliance, or setting a trap? What is the threat of the mind flayer enclave, and how extensive is it?
- Elder Nissa reveals more of her past, speaking of her childhood in the Deep Roads and her family who may still dwell in duergar cities. The party may have an opportunity to broker peace between the surface and underdark.
- The Undermountain Hammer and Captain's Insignia Ring prove valuable in future negotiations with duergar factions. The ring, especially, could grant the party an audience with higher-ranking duergar nobility if used wisely.
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