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Monsters

Sack

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Sacks are spider-web variants of normal Boils.

They cannot replace Boils or Guts, but can commonly be found in the Cellar.

Description

They are swollen lumps made out entirely of cobwebs.

Behavior

Sacks don't shoot projectiles, instead, they periodically spawn Spiders when fully swollen. Therefore, damaging them will prevent them from spawning Spiders, making them easy to kill.

Eternal Champion Behavior

Eternal Sacks spawn 2 spiders instead of one. They are among the easiest Eternal enemies to defeat, as they still will not attack if they are not at full size.

Notes

  • They can be spawned by spider-type bosses, such as the Widow.

Trivia

  • They appear in the Wrath of the Lamb DLC for the original game.
Monsters
Insects
Black Fly • Attack Fly • Moter • Eternal Fly • Pooter • Fat Fly • Boom Fly • Red Boom Fly • Drowned Boom Fly • Sucker • Spit • Dart Fly • Swarm Fly • Ring Fly • Level 2 Fly • Full Fly • Hush Fly • Ball of Flies • Spider • Big Spider • Trite • Ragling • Rag Trite • Level 2 Spider • Ticking Spider • Baby Long Legs • Crazy Long Legs • Wall Creep • Blind Creep • Rage Creep • Para-Bite • Cod Worm • Scarred Para-Bite • Round Worm • Nightcrawler • Roundy • Ulcer • Maggot • Charger • Spitty • Conjoined Spitty • Drowned Charger • Grub • Clotty • Clot • Mega Clotty • Leech • Kamikaze Leech • Holy Leech
Objects
Boil • Gut • Sack • Blue Boil • Host • Red Host • Wall Hugger • Slide • Poky • Stone Grimace • Vomit Grimace • Gaping Maw • Turret Grimace • Brimstone Grimace
Humanoids
Mulligan • Mulligoon • Mulliboom • Hive • Swarmer • Nest • Drowned Hive • Hopper • Flaming Hopper • Leaper • Pacer • Gusher • Splasher • Gaper • Frowning Gaper • Gurgle • Mr. Maw • Flaming Gaper • Cyclopia • Skinny • Rotty • Null • Greed Gaper • Blue Gaper • Swinger • Horf • Psychic Horf • Globin • Gazing Globin • Black Globin • Dank Globin • Knight • Selfless Knight • Floating Knight • Bone Knight • Bony • Black Bony • Fatty • Flaming Fatty • Conjoined Fatty • Blue Conjoined Fatty • Pale Fatty • Keeper • Hanger • Vis • Double Vis • Chubber • Cage Vis • Scarred Double Vis • Homunculus • Begotten • Dople • Evil Twin
Body parts
Mask + Heart • Brain • MemBrain • Guts • Mama Guts • Eye • Bloodshot Eye • Mom's Hand • Dead Mom's Hand • Scarred Guts • Nerve Ending • Stone Eye
Poop
Dip • Corn Dip • Brown Dip • Squirt • Dank Squirt • Dinga
Flyers
Maw • Red Maw • Psychic Maw • Death's Head • Dank Death's Head • Flesh Death's Head • Lil' Haunt • Wizoob • Red Ghost • One Tooth • Fat Bat • Tumor • Psy Tumor • Camillo Jr. • Baby • Angelic Baby • Imp • Dukie • Oob • Black Maw
Others
Fred • Lump • Embryo • B. Licker
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