B-I-N-G-O 
Creature — Dog
Trample Whenever a player casts a spell, put a chip counter on its mana value. This creature gets +9/+9 for each set of three numbers in a row with chip counters on them.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL