Beelzebub

Transformations

Guppy	Beelzebub	Super Bum	Yes Mother?	Bob	Fun Guy	Leviathan	Conjoined
Spun	Seraphim	Oh Crap	Bookworm	Spider Baby	Adult	Stompy

Transformation ID	1

After obtaining 3 fly items from the following list ( 3 items with the fly item tag), Isaac turns into a giant humanoid fly and gains flight. While in this form, the following flies transform into Blue Flies: Fly, Attack Fly, Level 2 Fly, Ring Fly, Full Fly, Dart Fly, Swarm, and Army Fly. The following flies will become friendly and are brought with Isaac to other rooms and floors: Pooter, Super Pooter, Tainted Pooter, Boom Fly, Red Boom Fly, Drowned Boom Fly, Dragon Fly, Dragon Fly X, Bone Fly, Sick Boom Fly, Tainted Boom Fly, Sucker, Spit, Soul Sucker, Ink, Mama Fly, Bulb, Bloodfly, Tainted Sucker, Moter, Fly Bomb, and Eternal Fly Bomb.

Active Collectibles

Name	ID	Icon	Quote	Description	Quality
Jar of Flies	5.100.434		Bug catcher	Killing an enemy adds a fly to the jar, up to a maximum of 20. On use, releases Blue Flies equal to the number of flies in the jar.	2
Plum Flute	5.100.650		Play time!	Summons Baby Plum to fight for Isaac for roughly 10 seconds, dealing high damage.	1 0

Passive Collectibles

Name	ID	Icon	Quote	Description	Quality
???'s Only Friend	5.100.320		Controlled friend	Spawns a controllable familiar that deals 37.5 damage per second on touch. It can be moved using the shooting directional keys	1
BBF	5.100.272		Big Beautiful Fly	Spawns a familiar that flies around the room in a zig-zag pattern and explodes on contact with an enemy. Respawns after ten seconds.	1 0
Best Bud	5.100.274		Sworn protector	When hit, spawns a quickly orbiting attack fly similar to Forever alone for the current room that deals high damage.	0
Big Fan	5.100.279		Fat protector	Spawns a large, slow-moving orbital familiar that blocks enemy shots and deals 30 damage per second to enemies. Reduces the speed other orbitals rotate at.	2 1
Distant Admiration	5.100.57		Attack fly	Spawns an attack fly that circles further out than Halo of Flies, but closer than Forever alone, dealing 75 damage per second.	2 1
Forever alone	5.100.128		Attack fly	Spawns an attack fly that orbits a long distance from Isaac, dealing 30 damage per second.	1
Halo of Flies	5.100.10		Projectile protection	Spawns two Pretty Flies that block enemy shots and deal contact damage to flies.	2
Halo of Flies	5.100.10		Projectile protection	Spawns two Pretty Flies that block enemy shots and deal contact damage to flies.	2
Hive Mind	5.100.248		Giant spiders and flies	Increases the size of Blue Spiders and Blue Flies and doubles the amount of damage they deal. Also increases the effectiveness of fly and spider familiars.	2
Skatole	5.100.9		Fly love	Flies become harmless or less dangerous depending on the type.	0
Skatole	5.100.9		Fly love	Flies become harmless or less dangerous depending on the type.	0
Smart Fly	5.100.264		Revenge fly	Spawns an orbital familiar that blocks enemy shots. Upon taking damage, the familiar will pursue enemies for the rest of the room, dealing damage.	2 1
The Mulligan	5.100.151		They grow inside	Tears have a 1/6 chance of spawning allied Blue Flies when they hit an enemy.	3
Friend Zone	5.100.364		Friendly fly	Spawns a white attack fly that orbits somewhere between Distant Admiration and Forever alone, dealing 45 damage per second.	1
Lost Fly	5.100.365		Lost protector	Spawns a fly familiar that moves in a straight line and circles around the first wall or obstacle it hits. It deals 105 damage per second on contact. It deals 56 damage per second and forces nearby enemies to attack it.	2
Obsessed Fan	5.100.426		Follows my every move...	Spawns a familiar that follows Isaac's movements on a delay and deals 30 contact damage per second to enemies.	0
Obsessed Fan	5.100.426		Follows my every move...	Spawns a familiar that follows Isaac's movements on a delay and deals 30 contact damage per second to enemies.	0
Papa Fly	5.100.430		Turret follower	Spawns a familiar that follows Isaac's movements on a 3 second delay, firing tears at nearby enemies.	1
Angry Fly	5.100.511		He's violent	Spawns a fly familiar that orbits around a random enemy and deals 30 damage per second to enemies it comes in contact with.	1
Bot Fly	5.100.629		Defense drone	Spawns an orbiting fly familiar that fires shielded tears at incoming enemy projectiles.	3
Fruity Plum	5.100.649		Bouncy friend	Gives Isaac a miniature Baby Plum familiar that propels itself diagonally around the room, firing tears behind itself as it travels.	1
Parasitoid	5.100.461		Egg tears!	Adds a chance to fire an egg sack which creates slowing creep and spawns a Blue Fly or Blue Spider upon hitting an enemy.	3
Psy Fly	5.100.581		Flamboyant protector	Spawns a fly orbital familiar that seeks out incoming enemy shots and destroys them.	4
The Swarm	5.100.693		Infest	Spawns eight orbital flies, which turn into Blue Flies after they block a shot. Each time a room is cleared, spawns another orbital fly.	2
YO LISTEN!	5.100.492		Yo listen!	+1 luck. Spawns a fairy familiar that points out Secret Rooms, Crawl Space entrances, and tinted rocks.	2
Infestation	5.100.148		Fly revenge	1-3 Blue Flies randomly spawn every time Isaac gets hit. 2-6 Blue Flies randomly spawn every time Isaac gets hit.	0
Infestation	5.100.148		Fly revenge	1-3 Blue Flies randomly spawn every time Isaac gets hit. 2-6 Blue Flies randomly spawn every time Isaac gets hit.	0

Notes

• Isaac starts with this transformation in the Solar System challenge.

Unlockable Achievements

• 

  Lord of the Flies - Become Beelzebub.

• 

  Angry Fly - Become Beelzebub.

Trivia

• Beelzebub, also known by "Lord of the Flies" and many other names, is known as one of the 7 princes of hell. Beelzebub is also another name for the devil.
• In modern Catholic tradition, Beelzebub is regarded as one of the 7 princes of Hell; however, the origins of the name Beelzebub actually dates back to an early Jewish insult for worshippers of a Canaanite Deity Ba'al 'Lord', or Ba'al-Zvul 'Lord of the manor/dwelling', calling him Ba'al-Zvuv, 'Lord of the flies'.
  • The achievement 'Lord of the Flies' is a reference to this.

The Binding of Isaac: Rebirth
Achievements Challenges Completion Marks Items Trinkets Characters Chapters Rooms Transformations Attributes Bosses Monsters Pickups Modes Curses Objects Seeds Effects Endings
Collection Item Pools Version History Modding Music