Spire Codex is now on Overwolf. Get the in-game overlay with live card lookups and one-click run uploads. Learn more →Spire Codex is now on Overwolf. Get the in-game overlay with live card lookups and one-click run uploads. Learn more →Which 3 bosses and 3 elites can appear in each act — Overgrowth, Underdocks, Hive, and Glory.
Bosses (1 randomly selected): Vantom, Ceremonial Beast, The Kin
Elites: Bygone Effigy, Byrdonis, Phrog Parasite
Bosses (1 randomly selected): Waterfall Giant, Soul Fysh, Lagavulin Matriarch
Elites: Skulking Colony, Phantasmal Gardeners, Terror Eel
Bosses (1 randomly selected): The Insatiable, Knowledge Demon, Kaiser Crab
Elites: Decimillipede, Entomancer, Infested Prisms
Bosses (1 randomly selected): Queen, Test Subject, Aeonglass
Elites: Knights, Mecha Knight, Soul Nexus
The first run after you unlock Underdocks is guaranteed to be Underdocks; after that it replaces Overgrowth 50% of the time. On A10, two bosses are fought at the end of the final act.