A very nice free summon indeed! His DC and unique special are super valuable to me!
There are several considerations. I could use DC and Ruptured Sky on an arena unit in the future like Ross or on a future legendary unit.
I could also give Ruptured Sky to my Iago so he has access to a faster special than Aether, but I could use Blue Flame for that instead.
Any other good Ruptured Sky users?