What if the skill has multiple levels? How are u gonna level disabled ability?you have to hide it in a spell book, and then disable the spell book. Spell book is an item ability which lets you access more spells. In the object editor you can put abilities into the spellbook. Just put your passive into the spellbook, and when you learn the ability, disable the spellbook for that player. (It is in player functions I think in the trigger editor) Passives still work inside disabled spell books.