Isair, Diverse Protector

Companion- Each creature or tribal card in your
deck has a different creature type.
(If this card is your chosen companion, you may
put it into your hand from outside the game for {3} any time you could cast a sorcery.)
Whenever this creature attacks, choose a creature
type, creatures you control of that type gain
+X/+X, where X is the number of creatures you control that are not that type.