Mardu Warmage

Kicker {g/u} (You may pay an additional {g/u} as you
cast this spell.)
When this creature enters the battlefield, if it was kicked for {g}, it enters with a trample counter. If
it was kicked for {u}, it enters with a flying
counter.
Whenever this creature attacks, it deals damage
to target creature equal to the number of
counters on it.