Blackberry, Watcher of Thyria

When Blackberry, Watcher of Thyria enters the
battlefield search your library for a cat or
planeswalker, put into your hand shuffle library.
Cats get +1/+2 and lifelink
Blackberry, Watcher of Thyria isn't a creature
unless your devotion to cats is 7 or greater.
If Blackberry deals damage to an opponent
you may play a cat from your hand without
paying its mana cost.