⚡Slay the Spire 2's most hated boss was born from one developer's Deadlock addiction. Co-founder Casey Yano confirmed Doormaker wasn't a Worm web-series reference, he just played too much Valve's game with a portal-making hero. Players HATED it for wrecking their decks, so the studio replaced it with Aeonglass. The Ceremonial Beast? Inspired by Princess Mononoke's Forest Spirit, not Valheim, and first drawn back in 2021.