Cave Yeti

Deathtouch
As long as Cave Yeti is an unblock attacker,
you may pay {r}{r}, if you do, you may add an Ursine Influence Counter on target non-legendary creature. (You gain control of a creature with a number of Ursine Influence Counter equal or bigger than the converted mana cost of that creature, it is a snow permanent in addition to its other type)