Spined Tyrranax 26/779 (Foundations Jumpstart)

At the beginning of combat on your turn, you may pay {2}{G}. When you do, put a +1/+1 counter on target creature. That creature gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

NM - $0.70
LP - $0.60
MP - $0.50
HP - $0.40
DMG - $0.30