Kappa Cannoneer - 108 R MKC

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Ward {4}
Whenever this creature or another artifact you control enters, put a +1/+1 counter on this creature and it can't be blocked this turn.

rare
Artifact Creature — Turtle Warrior
From the Magic: The Gathering set Murders at Karlov Manor Commander.