- own towers in black obsidian and dark iron with red glowing joints, bone spikes, skulls, chains; arrow spire with a ballista, hellmouth cannon with a demon-head barrel, dark spire with horns and a crystal; every level adds parts
- soul core: a crystal heart beating lub-dub (faster when hurt, cracked at low health) held by chains on an obsidian throne, veins with a pulse across the floor, rising embers
- portals: an arch of stone and bone with a skull and horns, a vertical vortex with runes and falling sparks; grey and dead until claimed
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>