Polycephalus

Polycephalus is a boss that can appear:

In Catacombs and the Flooded Caves.
Only in Catacombs.

Behavior[]

Polycephalus burrows underground when Isaac is not within range. While burrowed he becomes invincible and follows Isaac's movements. When close to Isaac, he pops out and performs one of the following attacks:

Sprays out a cluster of projectiles towards Isaac, similar to Monstro, but more drawn out.
Fires a spread of 3 projectiles at Isaac.
Shoots out 8 projectiles in all directions.
Summons a Round Worm.

He will stay vulnerable for a few moments after performing an attack before quickly burrowing underground again.

Champion Versions []

Red: Summons Para-Bites instead of Round Worms. All projectile attacks are replaced with a ring of six projectiles.
Pink: Two Polycephaluses, each with 50% HP (100), replace the normal Polycephalus. They do not spawn Round Worms.

Gallery[]

Polycephalus in-game.
Red Champion Polycephalus.
Pink Champion Polycephalus.
Polycephalus as one of Delirium's forms.

Trivia[]

The Stain is his posthumous version, who also shows up in Chapter 2. Polycephalus is one of four bosses to have their posthumous version in the same chapter, the others being Gemini having Blighted Ovum in Chapter 1, Chub having Carrion Queen in Chapter 2 and Tuff Twins having The Shell in Chapter 2.5.
- However, Polycephalus is the only one of them to have their posthumous version in the same environments as well, sharing both The Catacombs and the Flooded Caves with The Stain. The only difference is that The Stain can appear in Caves as well, where Polycephalus cannot.
  - This is no longer the case as of Repentance, since Polycephalus no longer appears in the Flooded Caves while The Stain no longer appears in The Catacombs.
Polycephaly is the condition of having more than one head.
Polycephalus shares his name with a cactus.
Polycephalus is one of the four bosses that can be spawned by It Lives, the other three being Chub, Fistula and Teratoma.
Prior to Booster Pack #5, Red Champion Polycephalus could spawn Scarred Para-Bites if he was fought in the Scarred Womb.

Bosses
Chapter 1	Gemini • Steven • Blighted Ovum • Dingle • The Duke of Flies • Famine • Gurglings • The Haunt • Larry Jr. • Monstro • Pin • Widow • The Fallen • The Headless Horseman Dangle • Little Horn • Rag Man • Turdlings Baby Plum
Chapter 1.5	Lil Blub • Wormwood • The Rainmaker • Min-Min • Clog • Colostomia • Turdlet
Chapter 2	Fistula • Chub • C.H.A.D. • Carrion Queen • Dark One • Gurdy • Gurdy Jr. • The Hollow • The Husk • Mega Fatty • Mega Maw • Peep • Pestilence • Polycephalus • The Wretched • The Fallen • The Headless Horseman The Forsaken • The Frail • The Stain Big Horn • Rag Mega Bumbino
Chapter 2.5	Reap Creep • Tuff Twins • Hornfel • Great Gideon • Singe • The Shell • The Pile
Chapter 3	The Adversary • The Bloat • The Cage • The Gate • Monstro II • Gish • Loki • Mask of Infamy • War • The Fallen • The Headless Horseman • Mom Brownie Sisters Vis Reap Creep • The Pile
Chapter 3.5	The Siren • The Heretic • The Visage • The Horny Boys • Mom • Mom's Heart
Chapter 4	Blastocyst • The Bloat • Conquest • Daddy Long Legs • Triachnid • Death • Lokii • Mama Gurdy • Mr. Fred • Scolex • Teratoma • The Fallen • The Headless Horseman • Mom's Heart • It Lives Sisters Vis • The Matriarch
???	Hush
Corpse	Chimera • The Scourge • Rotgut • Mother
Chapter 5	Satan • Isaac
Chapter 6	??? • The Lamb • Mega Satan
The Void	Delirium
Home	Dogma • The Beast • Ultra Death • Ultra Famine • Ultra Pestilence • Ultra War
Greed Mode	Ultra Greed Ultra Greedier

The Binding of Isaac: Rebirth
Achievements	Attributes	Bosses	Cards and Runes	Challenges	Chapters
Characters	Co-op	Items	Item pools	Monsters	Objects
Pickups	Pills	Rooms	Seeds	Transformations	Trinkets

Polycephalus

Contents

Behavior[]

Champion Versions []

Gallery[]

Trivia[]

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