Adui
Alright it can’t be only me who thinks he needs to merge animus summoning, lich summoning his witches ability and 2 summons ability from gremory plus some laws to create a ultimate summoning edict.
The author says that the person who has authority over a reality cannot interfere within it, so Cecilia can't kill Hyperion, but can other primordials not kill Hyperion either, like they can kill the ender of realities for each other? Through this, they don't need champions of reality or any other risks.