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Entity image

Table dividing line 1.png
Table dividing line 1.png
Stage The Caves icon.png
Stage The Depths icon.pngStage Necropolis icon.pngStage Sheol icon.pngStage Dark Room icon.png
Added in  AfterbirthStage Flooded Caves icon.pngStage Dank Depths icon.png

Swarmers are a Fly-hive like enemy found in Necropolis Necropolis, and very rarely in The Depths The Depths and The Caves The Caves.

Behavior[edit | edit source]

This enemy will constantly spawn Attack Flies. However, when hit, it will spit out two Pooters in variation. When the Swarmer is destroyed, it will spawn a Boom Fly.

This enemy does not shoot projectiles, so it's best to kill the flies first. If the player has considerable firepower, focusing fire on him hoping to kill the Boom Fly as soon at it spawns (and the surrounding flies with its blast radius) is also a viable strategy.

They can float across the room, which can be annoying when there are rocks blocking your shots. Additionally, they can be found hard to hit in big rooms.

Notes[edit | edit source]

  • As Swarmers have Champion forms it's possible to encounter a White Champion (though extremely rarely). This can be a challenging occurrence as the Swarmer will regain invincibility every time he takes damage because he'll spawn Pooters or Fat Flies.
  • Skatole SkatoleSkatole Icon.pngAll types of fly except Boom Fly and Red Boom Fly become passive and slowly move towards Isaac. Does not prevent contact damage.: The swarmer can be charmed and won't spawn any flies until it is damaged. The flies that spawn will also be charmed.

Trivia[edit | edit source]

  • This enemy is the next and possibly the final stage of the original Mulligan. As seen how the flies nested inside the Mulligan, they multiplied, forming the Hive, and eventually took control of the Hive, forming the Swarmer, being nothing but a flying nest of flies. It is very intentional, considering the game's theme of decay, how in the early chapters they seem partially "infected" by the flies, and they eventually decayed over time in the later floors.
  • The ring of Flies that surround the Swarmer are an indication of how much health he has. The Flies deplete as the Swarmer takes more damage.

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