Talk:Ainz Ooal Gown/Abilities and Powers/@comment-27742200-20160606164939

So in the end summons which cannot "graft" themselves on a corpse don't become permanent, regardless of the tier of the spell used...the reason the Dark Youngs disappeared is probably due to the fact that the sacrifice is a part of the spell itself. The only non-undead summons to not fade away so far are those created by a dedicated item like Horn of the Goblin general. The crucial thing is that it doesn't involve a spell, more like a special ability.