Ornery Tumblewagg 171 (Outlaws of Thunder Junction)

At the beginning of combat on your turn, put a +1/+1 counter on target creature. Whenever this creature attacks while saddled, double the number of +1/+1 counters on target creature. Saddle 2 (Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

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