Ezuri, Claw of Progress 44 (Commander 2015)

Whenever a creature you control with power 2 or less enters, you get an experience counter. At the beginning of combat on your turn, put X +1/+1 counters on another target creature you control, where X is the number of experience counters you have.

NM - $3.80
LP - $3.10
MP - $2.30
HP - $2.20
DMG - $2.20