Mothership Core and Seeker Missle Inability

I’m trying to add the Mothership Core back into the game, and I’d like to change its abilities as well, but when I add it to the nexus command card, there is no ability command, and as a result, it doesn’t appear in the game.

Also, I wanted to give the Ravens their seeker missile back because I think anti-armor is boring, but it says the raven already has the seeker missile ability which does 100 damage. Did they really just scrap the old seeker missile and can I change it back?

They do - If you pick the raven which is from the WOL campaign. Then you could edit the seeker missile ability. Not sure about the Mothership Core.