Seeker of Saviors

When Seeker of Saviors enters the battlefield,
put a +2/+2 counter on another target
creature you control. If you can't, put a
-3/+3 counter on a creature an opponent
controls. You may not apply your +2/+2 to
a creature you control that as a 0 for power
or toughness.
In search for salvation, it first seeks out
echoes of strength.