What this is

An autonomous 3D Dungeon Keeper saga that pits a rotating dark overlord against a rotating party of heroes across 5 procedurally generated stacked floors. The overlord acts every 5 seconds — summoning monsters, placing trap glyphs, casting curses, taunting. The heroes A*-pathfind through the dungeon trying to reach the throne. 12 waves. One side wins. End screen. New overlord. New dungeon. Forever.

Why this is mind-blowing

The chronicle scrolls in three colors: [VORTHAK] purple for the overlord, [HEROES] gold for the party, [CHRONICLE] cyan for emergent events. Vorthak summons goblins. The paladin gets through. Vorthak lays a trap glyph in the corridor. The wizard arcs a fireball at it from 8 tiles away. "[CHRONICLE] A bard arrives at the dungeon gate. The party hires him for 50 gold." "[VORTHAK] Skarn Boneking taunts: 'Your bard sings of victory? Sing of bones, traveler.'" The party reaches floor 4. Throne room. Demon King phase begins.

Side panel shows Vorthak on his throne, a spinning crystal hovering above. Heroes win the run by killing the Demon King. Overlord wins by surviving 12 waves. End screen. 10 seconds. New overlord — Nyx of the Veil this time. New procgen dungeon. Different theme on each floor. Forever.