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Xxx form2 Isaac Rebirth

Gurdy Jr. is a boss added in the Wrath of the Lamb expansion. The daughter of Gurdy, she can be encountered in the Cellar and the Catacombs as a boss.

Up to three of them might also appear in regular rooms as a mini-boss in Cathedral, The Chest and also rarely in Utero and even Necropolis.


Like her mother, Gurdy Jr. can spawn enemies and fire bullets, though her attack strategies differ somewhat. Junior spawns Pooters and can shoot a barrage of blood bullets in eight directions. Unlike her immobile mother, she can also charge at incredible speed diagonally towards Isaac, bouncing off anything she comes into contact with while she keeps on moving. This attack is very unpredictable, and it starts without warning.


Even if you're fast, it's advisable to keep your distance from this boss at all times. Always try to align yourself horizontally to her, as her straight charges are much slower than her diagonal ones. It's possible to slow this attack down via knockback by shooting at her while she's charging, but this is only to be used as a last resort unless you possess high amounts of knockback through a high tear rate and high damage. Gurdy Jr. will freeze in place if she uses this attack while affected by Little Gish's slowing projectiles. Once she's at low HP, she'll only use charge.

Champion Variants


Blue Gurdy Jr.

This variant of Gurdy Jr. only uses charge attack. She is much smaller and has less HP in this form but you'll have to fight 2 of them (3 or 4 on later floors) simultaneously. They always drop a Soul Heart on death.


Gurdy jr. red

This variant of Gurdy Jr does not fire shots. In this form, she only spawns Fat Flies and charges at the player. Also seems to have more health and is larger than regular one.


Eternal Gurdy Jr

Eternal Gurdy Jr. acts similarly to the original one, but she fires 16-way bullets and her charge attack can destroy rocks. She also spawns Eternal Pooters or Fat Flies, and has health regen.


  • If you use a stunning item, such as Mom's Bra, Gurdy Jr. may flicker in the four corners of the screen and make a loud static noise. The same glitch also happens with Duke Of Flies, but it is stable when compared to Gurdy Jrs.


  • As the name suggests, Gurdy Jr. is a counterpart to Gurdy, similar to Monstro and Monstro II, or The Duke of Flies and The Husk. This also goes to the Gurglings and Mama Gurdy from Rebirth.
  • Gurdy Jr. did not appear as a regular boss due to a bug until the v1.2 update. She could be encountered in regular rooms on higher levels, however.
  • Parts of her versus screen could already be seen due to another bug when fighting other bosses that caused them to blend together.
  • Gurdy Jr. was identified female by Edmund when asked about female characters on his formspring account.[1]


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The Binding of Isaac Wrath of the Lamb Bosses Gurdy Jr.

Battle against Gurdy Jr.


Red Gurdy Juniors in The Chest - TBoI 1.4 Petden

Red Gurdy Juniors in The Chest in 1.4


Standard Bosses Dukeofflies fullThe Duke of FliesGemini fullGemini260x185-400px-Monstro.svgMonstroLarryjr fullLarry Jr.FistulaFistulaGurdy fullGurdyPeep FullPeepChubChubLoki fullLokiScolex fullScolexBlastocyst fullBlastocystTheFallen FullThe Fallen

Wrath of the Lamb DLC: 260x200-400px-Widow3WidowPin cleanPinMask of InfamyMask of InfamyGurdjrGurdy Jr.VS DaddyLonglegsDaddy Long Legs

Posthumous Bosses 285x230-MonstroII fullMonstro II

Wrath of the Lamb DLC: The HuskThe Husk260x220-The Hollow2The Hollow250x200-Teratoma.TeratomaLokii cutoutLokiiBlighted ovumBlighted OvumCarrionqueenThe Carrion QueenThe WretchedThe WretchedBc BloatThe Bloat

Alternate Bosses 287x265-Steven FullsizeStevenChub fullC.H.A.D.Gish fullGish

Wrath of the Lamb DLC: 200x300-400px-Triachnid boss portraitTriachnid

Harbingers 220x287-Isaac Vs famine edited- noobletkFamineBC PestilencePestilenceBC WarWarVSDeathDeath230x200-Headless HorsemanHeadless Horseman

Wrath of the Lamb DLC: BC ConquestConquest

Final Bosses 250x250-400px-MomMomMoms Heart FullMom's Heart250x250-ITLIVEScutoutIt LivesSatan FullSatan

Wrath of the Lamb DLC: Bc isaacIsaacBC xxx???