Polo, Guide's Descendant

First Strike, Reach, Skulk
Polo is also a Warrior and a Wizard in addition to
its other types
Whenever a creature spell you cast is copied, you
may pay {2}, If you do, put a number of +1/+1 counters on Polo equal to that spell's
mana value and deal damage equal to the amount
of +1/+1 counters on Polo to target creature
an opponent controls