Power Fist

Artifact — Equipment - (rare)

Equipped creature has trample and "Whenever this creature deals combat damage to a player, put that many +1/+1 counters on it."
Equip 

A fist fight will leave a bruise. A power fist fight will leave a crater.

Price

cardkingdom 14.99

cardsphere 9.04

manapool 7.81

tcgplayer 7.64

cardmarket 7.84