Spawns a stationary fly turret that shoots at enemies up to 3 tiles away
The flies are completely invulnerable and ignored by enemies.
The flies deal 2 / 3.5 damage per shot.
This item belongs to the Oh Crap set. Collecting three items from this set will transform Isaac into a walking pile of poop.
Notes
This item has a 1% chance to drop when defeating Turdlet.
A maximum of 35 / 64 flies can be spawned in one room.
Flies spawned by Brown Nugget as Tainted Lazarus will disappear when flipping to his other form, and will not reappear when flipping back.
All flies spawned during The Beast's fight (and any Ultra Harbinger fight before that) will persist at a static position on-screen and will not move as the screen scrolls.
Synergies
Book of Virtues: Spawns brown wisps on the middle ring. These wisps shoot 3 times faster with 1/3rd of the damage of an average wisp. The wisps automatically shoot at nearby enemies instead of in the direction Isaac shoots. The wisps do not persist between rooms.
Car Battery: Two flies will be spawned instead of one.
BFFS!: Flies are larger, but do not deal increased damage.
Hive Mind: Flies are larger and deal double damage.
Sacrificial Altar: Spawned fly turrets count as familiars for sacrificing; although dropping the Brown Nugget will despawn the last fly turret, older ones will remain and can be sacrificed
Sacrificial Altar: Spawned fly turrets count as regular blue flies for sacrificing, and thus are converted to pennies.
Brown Nugget was originally an unofficial item which was supposed to showcase the modding capabilities of Afterbirth+ in the PAX 2016 livestream. However, all items included in the demo were later added to the final game.
2 / 
3.5 damage per shot.
Oh Crap set. Collecting three items from this set will transform Isaac into a walking pile of poop.
This item has a 1% chance to drop when defeating 
Turdlet.
Tainted Lazarus will disappear when flipping to his other form, and will not reappear when flipping back.
The Beast's fight (and any Ultra Harbinger fight before that) will persist at a static position on-screen and will not move as the screen scrolls.
Book of Virtues: Spawns brown wisps on the middle ring. These wisps shoot 3 times faster with 1/3rd of the damage of an average wisp. The wisps automatically shoot at nearby enemies instead of in the direction Isaac shoots. The wisps do not persist between rooms.
Car Battery: Two flies will be spawned instead of one.
BFFS!: Flies are larger, but do not deal increased damage.
Hive Mind: No effect.
Sacrificial Altar: Spawned fly turrets count as familiars for sacrificing; although dropping the Brown Nugget will despawn the last fly turret, older ones will remain and can be sacrificed
Poop 
