Succubus

Succubus is an unlockable passive item added in The Binding of Isaac: Afterbirth.

Effects

Spawns a familiar that bounces around the room and has a dark aura around it.
- Enemies within the radius of the aura take damage.
  - The aura deals 30% of Isaac's damage per tick or about 129% of Isaac's damage per second.
  - The aura deals 2.5 damage per tick or about 7.5-10 damage per second.
- If Isaac is within the aura, his tears gain a 1.5× damage multiplier.

The damage boost stacks with other Succubi, as well as other damage multipliers (e.g. Cricket's Head, Sacred Heart, etc.).

Rock Bottom: The damage boost is permanent. Damage is easier to stack, since Isaac can enter the Succubus aura to permanently boost any temporary damage-ups.

BFFS!: Succubus and its damaging aura are visually larger, but the damage multiplier is not increased any further away from the familiar. However, the damaging aura is increased.
Libra: When Isaac is within the aura, affects re-balanced stats rather than just damage.

In folklore, Succubi are female demons that attempt to seduce men in their dreams.
Incubus is the male version of a succubus.

Bug!	If Succubus is spawned through Cambion Conception, its dark aura will not grant a damage multiplier to Isaac.

Bug!	If Sacrificial Altar is used to sacrifice Succubus while Isaac is in its dark aura, the damage multiplier will remain active until the remainder of the floor.