Talk:Ainz Ooal Gown/Abilities and Powers/@comment-2600:8804:5503:AC00:F89D:3334:361C:797-20180406222000

Where is this mentioned?: However, this doesn't seem to work with a super-tier spell like Iä Shub-Niggurath, which uses the living as sacrifices for summoning Dark Young temporarily. While Ainz is an undead necromancer, he is still able to somehow summon angels with a super-tier spell rather than just the undead.

From what I've read of the novel, there's no mention of them having a cooldown or being unsummoned. I always assumed they were just sent back to Nazarick after use, since I never saw mention of them being unsummoned in any way.