Mesa Prime

Double Strike, Reach, Vigilance At the beginning of your combat phase, target random creature you control other than Mesa gains +3/+3 and First Strike. When a creature an opponent controls attacks you, this creature deals 1 damage to it. Whenever this creature deals damage, it gains a +1/+0 counter. When this creature has 10 or more +1/+0 counters on it, this creature deals damage equal to any target, then remove 10 +1/+0 counters from this creature. Leftover damage dealt by this creature can be dealt to another creature instead.