Overview
So to get easy unlocks with the lost you must first unlock missing poster trinket by beating dark room with isaac.Then go in a run with any character of your choice (you can’t use seeds to if you want to unlock something) then find missing poster trinket and when you get it try to get a good run. Then if you want to unlock the soul for example then go to the lamb and then die and you will respawn with the lost so all you have left is kill the lamb and you will get the unlocks.Sorry for my bad english but i hope i helped someone 🙂