“You enter the dank cave entrance, damp dripping down the walls. The passageway seems to go on forever, extending away into the darkness, your steps echoing into oblivion. Finally, after what seems like hours, you see a dim light reflected against the tunnel wall. You reach the opening, and look out into the vast cavern…”
The Hall of the Tarrasque
The hall consists of six areas, each designed to test the party in some way. I’ll give a brief description of each room, but for more details on how I ran the mechanics, check out my Patreon page; the full run down will be up there by the end of the week.
Area one consists of a narrow ledge, overlooking a terrifying drop, and a large, but empty, room containing two levers. Each of these levers open one of the secret doors which block areas 3 and 4.
Area 2 is simply a circular, stone room. When the levers in area 1 are pulled, however, two large stones ascend into the ceiling, revealing areas 3 and 4.
Area 3’s major feature is a deep, wide pool, riddled with semi-sentient vines. Deep in the pool is a melon-sized sphere, which glows blue. If a party member enters the pool, the vines attack and hold the player beneath the water…
Area 4 is the scene from Temple of Doom; an altar stands on a plinth, with a melon-sized yellow sphere sat on top of it. The altar is trapped, and releases a rolling boulder which will hit players in its way, finally blocking the exit from the room as it begins to fill with sand…
Area 5 is the ‘bridge’. The bridge consists of two posts with a small dent in each, extends a few feet over the abyss, then ends. The abyss itself contains an antimagic field. The field is dissipated, and the bridge completed, when the two orbs from areas 3 and 4 are placed on the two posts.
As the antimagic field dissipates, the monster hidden high in the cavern awakes. The party must flee to across the broken masonry and rubble of the procession, and make it down the stairs, into the dungeon proper, all while the Tarrasque brings parts of the ceiling down on them, eventually stepping into the cavern and seeking the party out…
This cavern acts well as the entrance to a larger dungeon, and is based entirely around skill challenges, and thinking outside the box. I increased the difficulty, not by increasing the DC of the challenges (this would render the map subject to luck, which can be frustrating), but by utilising timers to give a feeling of suspense, and to focus the players’ thinking. Encourage the players’ creativity, and reward it.
I hope this gives you some ideas for running this map, or similar encounters, yourself, and hit me up with how it went! Until then, cheers!