Sanguine Bond

Sanguine Bond is a passive item added in The Binding of Isaac: Repentance.

Effects

 * Spawns a special set of spikes in the Devil Room.
 * Taking damage from the spikes has a chance to grant a reward.

Synergies

 * + : The spikes generated by Sanguine Bond can be farmed infinitely.
 * / / : The pennies that are spawned when stepping on the spikes can be used to heal Keeper and infinitely farm rewards.

Trivia

 * This is possibly a reference to the card of the same name from Magic: the Gathering card game.

Seeds
FY11 XGL4 (Curse Room adjacent to spawn)