Scapular

Scapular is a passive item.

Effects

 * Once per room, when Isaac is reduced to his last half Heart (either red, soul, or black), the aura around his head temporarily vanishes and he is granted one Soul Heart.
 * After re-entering a room, the ability can be triggered again.

Synergies

 * Bloody Lust - Isaac can use the regenerating health to easily get the full damage bonus out of Bloody Lust by intentionally damaging himself.
 * Cursed Eye - If Isaac has half a red heart after taking damage while charging, he will teleport and gain one soul heart, which can be used to teleport infinitely.
 * Cursed Skull - At half a red heart, Isaac will teleport out of a room whenever he takes damage and will automatically gain one soul heart.
 * Habit - If Isaac only has half a heart left and can access a reliable source of repeatable damage (e.g. fire or spikes), then this can be used to recharge an activated item as many times as wanted.
 * IV Bag - The IV Bag uses Soul Hearts when at half a red heart, which can be used to obtain unlimited money.
 * Piggy Bank, Swallowed Penny, Fanny Pack - Allows Isaac to gain infinite money or pickups using a source of repeatable damage.
 * Sharp Plug - Infinite item recharges. （NEED THE WAFER FIRST！OR ISAAC IS KILLED!）At half a heart, Isaac will gain a soul heart, which, upon activation of the activated item, will trigger the Sharp Plug damage, which will be absorbed by the Soul Heart, causing the Scapular to trigger again.
 * Spider Baby - Isaac can have unlimited spiders if he finds a reliable source of repeatable damage.
 * The Wafer - Reduces all damage to half a heart, allowing Scapular to activate every room as long as Isaac enters each room with more than half a heart.
 * Whore of Babylon - Will leave Isaac with more protection immediately after triggering the effect of the item by having his health reduced to one half heart.

Seeds
EASX 92JD (Treasure room adjacent to spawn) B7W3 3HQ9 (First floor treasure room) 4G3S SVNB (Treasure Room adjacent to spawn (if The Halo has not been unlocked)) 4ENG XYYW (Treasure Room adjacent to spawn, Normal Mode. Includes Gimpy, Dead Cat, and The Wafer) GSSV HL2M (First floor treasure room) JW0T PBNC (First floor treasure room) SCHS XTT4 (Second floor treasure room) S6EY 7YZT (First floor treasure room (west); Curse of the Labyrinth) QAEQ VRDP (Treasure Room adjacent to spawn)