Item: 163.0 Ghost Baby Spawns a familiar that follows Isaac around and fires spectral tears. As a side-effect of having no health meter, all deals with the devil can be taken free of charge, despite showing a cost of 3 soul hearts. Similar Achievements to Binding of Isaac Achievement: Lost Baby. The Lost cannot gain health through any known means, even via soul hearts, black hearts, and HP upgrades. While playing as the Lost, the player notably begins with flight and without any health, and as such will die as a result of any damage taken. Note that resurrecting with the Ankh, Lazarus' Rags or Judas' Shadow and dying in the appropriate fashion still fails the requirements and you will have to start over. Azazel must kill the fallen then die from Satan's second or third stage.Being killed by anything else in the fight will cause the run to fail and you will need to start over from the beginning. Seeds work for only unlocking the lost im pretty sure. Make sure youve defeated The Lamb as Isaac so youve got it unlocked. Well, I guess there's other avenues for super random characters. You have to get a missing poster and die in the sacrifice room with it. I'm kind of sad they made rerolls viable at the same time as taking them away, would've liked some d7 adventures now that you can't reroll holy mantle. Judas must die by Mom's foot or Mom's hand during the boss fight. Seeds wont be helpful for unlocking things, they disable achievements.Magdalene must die from bombing herself in the Caves/Catacombs (can be XVI The Tower tarot card).Isaac must die from a Mulliboom (Muliiboom spawns in the door under you in this seed JTMD EZPF).The Lost is unlocked via very specific deaths which must be done in order without closing the game or dying erroneously between runs. The Lost is one of the 11 Playable Characters in The Binding of Isaac: Rebirth Starting Activated and/or Collectible Items:

Binding of isaac the lost