Boom Fly

### Found In

**Boom Flies** fly across the room diagonally in straight diagonal lines, dealing contact damage. Explodes upon death.

## Notes

* While  is held, the Boom Fly and all of its variants will fly significantly slower and will not deal contact damage, but their other means of attacking/dealing damage will still damage Isaac as normal.
* While Isaac has the Beelzebub transformation, all Boom Fly variants will become friendly, and will not damage Isaac by any means (including explosions).

## Variants

### Stage HP

 20 8
 0 3

### Found In

Chance to replace Boom Flies

**Red Boom Flies** fly across the room in straight diagonal lines, dealing contact damage and releasing 6 blood shots in all directions upon death.

### Stage HP

 20 8
 0 3

### Found In

Chance to replace Boom Flies and Red Boom Flies in the Flooded Caves

**Drowned Boom Flies** fly across the room in straight diagonal lines, dealing contact damage. Upon death, they explode and release 4 blood shots in the cardinal directions, and sometimes also spawns a Drowned Charger. If a Drowned Boom Fly dies while over an obstacle or pit, the Drowned Charger will not be spawned.

### Stage HP

 8
 3

### Found In

**Dragon Flies** fly across the room in straight diagonal lines, dealing contact damage. Upon death, creates four lines of fire in the cardinal directions; the fire nearly spans the length of an entire normal-sized room.

### Stage HP

 8
 3

### Found In

**Dragon Fly X** is identical to the Dragon Fly in behavior, but upon death, creates four lines of fire in the ordinal directions; the fire nearly spans the length of an entire normal-sized room.

### Stage HP

 8
 3

### Found In

**Bone Flies** fly across the room in straight diagonal lines, dealing contact damage and firing bones at Isaac if he lines up with one in a cardinal direction. Upon death, they shoot 3 evenly spaced bones (one of them aligned towards the closest cardinal direction to Isaac).

### Stage HP

 8
 3

### Found In

**Sick Boom Flies** fly across the room in straight diagonal lines, dealing contact damage and trailing poisonous gas. Upon death, they explode into eight clouds of gas and release 6 green shots in all directions. The poison gas left behind upon death persists for much longer, but will dissipate when the room is cleared.

### Stage HP

 20
 0

### Found In

Found on the Ascent to Home.

**Tainted Boom Flies** fly across the room in straight diagonal lines, dealing contact damage. Upon death, they will emit a cross-shaped glow for a brief period, after which they will explode. This explosion sends 4 lines of further explosions in the cardinal directions, which span the length of the room.

They are exclusive to the Ascent to Home.

## Gallery

* A Dragon Fly's appearance in Ashpit.
* A Dragon Fly X's appearance in Ashpit.
* Concept art for what appears to be the Bone Fly alongside concept art for Pin, Mega Maw, and The Gate.

## Trivia

* The Boom Fly is tied with the Sucker for being the monster with the most true variants ('true variants' being monsters with ID x.1, x.2, etc), both with 7.
* Both Dragonfly types and the Sick Boom Fly first appeared in the *Antibirth* mod. In *Antibirth*, instead of having any stage hp they had 20 base hp.
	+ Sick Boomflies would only create poison gas on death and would not shoot out six tears when dying.