The Swarm
ItemRepentanceLocked
passiveGame ID 693★★★★
How do you unlock The Swarm?
In The Binding of Isaac, The Swarm is unlocked by earning the The Beast completion mark as Tainted ???.
Structured pathSource-backed requirements are mapped into trackable steps.
Spawns eight orbital flies, which turn into Blue Flies after they block a shot. Each time a room is cleared, spawns another orbital fly.
What unlocking The Swarm leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13