Binding of Isaac: Rebirth Wiki

Lumps remain stationary in one spot and shoot a spread of three shots towards Isaac when he comes within range, then they burrow underground and resurface in a different part of the room. If they resurface in range to shoot at Isaac, they will do so incredibly quickly before burrowing underground again.

Lumps will also burrow underground to reappear elsewhere if Isaac doesn't approach them for period.

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Variations[ | ]

Tar Boy[ | ]

(in Afterbirth † and Repentance)

Tar Boys occasionally fire a short-ranged spray of shots towards Isaac that leaves behind slowing Black Creep. It can also burrow underground and resurface in a different part of the room, much like the Lump. However, it is only able to resurface in areas that have Black Creep and it will prefer to resurface close to Isaac.

If Isaac is standing on Black Creep, Tar Boys can (except in Repentance) launch a fountain of tar shots straight upwards out of the Creep where Isaac is standing/(in Repentance) create a Nerve Ending-like tentacle directly underneath Isaac. This can also occur with Black Creep spawned by other enemies such as Gushes.

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Trivia[ | ]

Bugs[ | ]

Bug Bug! If you stun a Lump at the same time that it burrows underground, it will cause their sound effect to repeat continuously for a few seconds.
Bug Bug! (in Afterbirth and Afterbirth †) If a Lump spawns as a Light White Champion, when the Lump burrows underground, its Eternal Fly will rapidly teleport around the room, potentially resulting in unavoidable damage.