Kel-El, Man of Steel

Flying, Indestructible, Partnership (Partner with other Kryptonian)
Hero creatures you control get +X/+X, where X is the number of Hero creatures you control.
Whenever you cast a legendary spell from your hand, exile cards from the top of your library until you exile a legendary nonland card with lesser mana value. You may cast that card without paying its mana cost. Put the rest on the bottom of your library in a random order