Pridemalkin is a common Creature — Cat card from March of the Machine Commander (MOC), collector number 308. Current market price: $0.39, TCGplayer market prices via Scryfall.
When this creature enters, put a +1/+1 counter on target creature you control. Each creature you control with a +1/+1 counter on it has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)