Luna, Arctic Goliath

Defender, Deathtouch

Luna, Arctic Goliath enters with 5 thaw counters. When Luna, Arctic Goliath has no thaw counters, it gains +4/+6 and lifelink.

Whenever a Dog or Cat enters the battlefield under your control, remove a thaw counter from Luna, Arctic Goliath.
—
"Hey! Put that down! What is that!?"