Which champion to use fantastic four rank-up gem on

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out of these champs i think Peni is a solid choice and def worth that rank up. But yeah you can hold the gem as well.

Mordo is goated

Captain Marvel is a good choice if you need a decent Onslaught counter.

CMM if you like her and play her especially since she’s duped. If you don’t play her much, save it.

cap marvel is insaney good when duped do her