Envy in the Binding of Isaac: Rebirth (BOIR)

Envy is a miniboss in The Binding of Isaac: Rebirth (TBOIR)

Envy is one of the Seven Deadly Sins

Envy will fly diagonally around the room

It bounces diagonally when it hits a wall.

Envy splits into 2 heads when you first kill it.

Then it splits into two smaller heads

which in turn split into two tiny heads each when killed

When Envy dies, a Troll Bomb is spawned.