Slay the Spire 2 developer shows artwork and concepts for Doormaker boss replacement Aeonglass
Slay the Spire 2 developer Mega Crit has revealed the artwork and design process behind Aeonglass, the new Act 3 boss that replaced Doormaker last month. The replacement is part of the developer’s ongoing effort to refine the roguelike deckbuilder’s gameplay balance and challenge progression during early access.
Aeonglass marks the fourth different boss to occupy the Act 3 slot, demonstrating Mega Crit’s iterative approach to boss design. The studio has maintained a steady cadence of updates that rework existing encounters and occasionally remove bosses entirely in pursuit of the game’s ideal difficulty curve and player experience.
The new boss features an hourglass-inspired visual design that stands out among the game’s most visually distinctive encounters. Mega Crit’s reveal of the concept art provides insight into the creative process behind the boss’s distinctive aesthetic. While the studio has not confirmed whether Aeonglass will remain in the final 1.0 release—given the history of Act 3 boss changes—the reception to its design suggests it may represent a more stable direction for that encounter.
The ongoing boss iterations reflect a common approach in early access development, where developer feedback and player data inform continuous refinements to core gameplay elements before launch.