Siren Uplifter

Flying
Heroic - Another target creature you control
with power 2 or less gains flying until end of
turn. It must attack this turn. At the end of
the turn, put a +1/+1 counter on.
Kruphix is taking steps to ensure the young men and
women of Theros don't have the option of a sedentary
life at home. Rather, a far journey back from a
strange land."