Quote Originally Posted by lololink View Post
Ultima Weapon traps the primals and prevents them from being summoned again.
Just wanted to clarify, the Ultima Weapon does NOT prevent primals from being summoned again after eating it. Alphinaud explicitly states that the reason the beast tribes don't summon primals while the Ultima Weapon is still operational is because they're AFRAID that the primals they summon would just get eaten immediately (i.e. a waste of crystals).