Theoden's Standard-bearer

When Theoden's Standard-bearer enters
the battlefield, if {g} was spent to cast it,
put a +1/+1 counter on target creature.
If {w} was spent to cast it, you gain 2 life.
(Do both if {g}{w} was spent.)
"We cannot defeat the armies of Mordor."
"No, we cannot. But we will meet them in
battle nonetheless." ~ King Theoden