Esau Jr.

Esau Jr. is an activated item added in The Binding of Isaac: Repentance.

Effects

 * When used, swaps between the current character and Esau Jr., who has three black hearts, +2 flat damage, and flight.
 * Despite starting with only black hearts, Esau Jr. is able to gain heart containers.
 * Coins, bombs, and keys are shared between the two characters, but everything else (including hearts, items, cards/pills, and trinkets) are not shared and apply only to the character that collects them.
 * Esau Jr. will have the same base stats, character-specific abilities and passive starting items (such as 's blindfold and ) as the original character.
 * The only exception is /, who will have different stats and passive starting items.
 * When used for the first time, Esau Jr. immediately gains random items equal to the number of items the original character had.
 * Each new item will come from the same item pool the respective original item was taken from, similarly to the.
 * Substitute Trinkets, Cards, Pills, and/or Active items are not given; only passive items are.
 * Quest items like and set drops like  are not included when counting the number of items.
 * Any pickups that would normally be generated by the new items will all simultaneously drop when Esau Jr. is first used.
 * If either character dies, they both die, regardless of whether the other character has any remaining health.

Interactions

 * //: Will affect the items given to Esau Jr. when used for the first time, but will not affect subsequent uses. Item generation is only affected if the character that has it is currently active.
 * : The extra active item will continue to be held by the character that has Schoolbag. However, it cannot gain charges through any means until the character becomes active again.
 * : Esau Jr. will only activate once, allowing it to be used normally.
 * : The extra item given from turning into Esau Jr. for the first time will be different from the one given by Eden's Blessing.
 * : Gives a black wisp when used to turn into Esau Jr that is otherwise identical to a normal one; turning back into the original character destroys the wisp. All other wisps are retained between forms.
 * : Wisps will be retained between forms. For the character that doesn't have Lemegeton, the wisps effects are only updated when one of them is destroyed.
 * /////: The character that has the item must be active going to a new floor for it to have its effect.
 * In the case of Luna, the character that has the item must also be active going into Secret Rooms for them to spawn beams of light. However, either character can then enter the beam of light to gain tears and soul hearts.
 * /: If the character that has the item is inactive going to a new floor, it will activate for them immediately when they become active.
 * : The soul respawns every time the character that has Lost Soul becomes active. If it's the first time Lost Soul spawned after going to a new floor, it will give a reward, regardless of whether or not it died on the previous floor.
 * Panic Button: Activates Esau Jr. before the active character takes damage, redirecting the damage to the inactive character. The item's charge is used in the process.
 * //: Esau Jr will have one heart container, but can still gain heart containers up to the character's normal cap.
 * In the case of Bethany, Soul Hearts will still be used as soul charges instead of health.
 * : If used as The Forgotten, Esau Jr. will have three empty bone hearts and the bone club, and cannot gain soul hearts. Both forms will also be unable to turn into The Soul. If used as, Esau Jr. will not be bound to The Forgotten's Body. If used again to turn back into The Soul, The Forgotten's Body will also be summoned alongside them, but the player cannot turn back into them, preventing them from moving between rooms and causing a softlock.
 * : Esau Jr.'s starting black hearts will quickly drain down to half a heart; he must obtain heart containers while in this form to have any survivability.
 * : The items given to Esau Jr. on the first use are based on the item pool of the first room Tainted Cain gained an item from. Other abilities are unchanged.
 * : Taking damage will turn Esau Jr. back into Tainted Eden, along with all of its other effects. Tainted Eden's health before transforming into Esau Jr. will not be recovered.
 * : Esau Jr. takes half a heart of contact damage from Dark Esau instead of turning into a ghost. Dark Esau's death explosion also does not affect him.

Seeds
J1KG XYFQ (First floor treasure room)