Birthright

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

Effects

 * Gives a unique passive ability that varies from character to character. The effects are defined related to each character's feature.

Trivia

 * This item's name and unlock requirement are likely a reference to the biblical story of Jacob and Esau, in which Esau trades his birthrights to Jacob in exchange for stew. The reference is strengthened by the Birthright's specific effect when taken by Jacob or Esau, allowing them to "inherit" the items of their brother.