Skyknight Squire (Foundations)

Whenever another creature you control enters, put a +1/+1 counter on this creature. As long as this creature has three or more +1/+1 counters on it, it has flying and is a Knight in addition to its other types.

NM - $1.50
LP - $1.50
MP - $1.50
HP - $1.50
DMG - $1.50