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Ulcer

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Keeper sprite

Ulcers are monsters added to the Afterbirth DLC for The Binding of Isaac: Rebirth. They first appear in Chapter 1.

Despite their appearance not resembling to a worm, they are still related to the Round Worm and its other related variants.

Behavior

They burrow and surface like all other worm enemies but slightly slow. If Isaac is in their line of sight, they will usually spawn a Dart Fly, but they may rarely shoot a blood shot. Ulcers take more time to burrow after they surface, making them more vulnerable to attacks.

Notes

  • If Isaac is far away from them, Ulcers will not spawn a Dart Fly or shoot. Same apply to other worm variants.

Trivia

  • An ulcer is a break in the membrane of an organ and hinders it from performing its normal functions.[1]

References

Monsters
Insects
Black FlyAttack FlyMoterEternal FlyPooterFat FlyBoom FlyRed Boom FlyDrowned Boom FlySuckerSpitDart FlySwarm FlyRing FlyLevel 2 FlyFull FlyHush FlyBall of FliesSpiderBig SpiderTriteRaglingRag TriteLevel 2 SpiderTicking SpiderBaby Long LegsCrazy Long LegsWall CreepBlind CreepRage CreepPara-BiteCod WormScarred Para-BiteRound WormNightcrawlerRoundyUlcerMaggotChargerSpittyConjoined SpittyDrowned ChargerGrubClottyClotMega ClottyLeechKamikaze LeechHoly Leech
Objects
BoilGutSackBlue BoilHostRed HostWall HuggerSlidePokyStone GrimaceVomit GrimaceGaping MawTurret GrimaceBrimstone Grimace
Humanoids
MulliganMulligoonMulliboomHiveSwarmerNestDrowned HiveHopperFlaming HopperLeaperPacerGusherSplasherGaperFrowning GaperGurgleMr. MawFlaming GaperCyclopiaSkinnyRottyNullGreed GaperBlue GaperSwingerHorfPsychic HorfGlobinGazing GlobinBlack GlobinDank GlobinKnightSelfless KnightFloating KnightBone KnightBonyBlack BonyFattyFlaming FattyConjoined FattyBlue Conjoined FattyPale FattyKeeperHangerVisDouble VisChubberCage VisScarred Double VisHomunculusBegottenDopleEvil Twin
Body parts
Mask + HeartBrainMemBrainGutsMama GutsEyeBloodshot EyeMom's HandDead Mom's HandScarred GutsNerve EndingStone Eye
Poop
DipCorn DipBrown DipSquirtDank SquirtDinga
Flyers
MawRed MawPsychic MawDeath's HeadDank Death's HeadFlesh Death's HeadLil' HauntWizoobRed GhostOne ToothFat BatTumorPsy TumorCamillo Jr.BabyAngelic BabyImpDukieOobBlack Maw
Others
FredLumpEmbryoB. Licker

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