The colossus of Rhodes

Creatures you control get +1/+1
Black, white and red creatures you control get
+1/+0
{x}{w}{b}{r}, {t}: The next time you cast a creature
spell this turn, create X 0/1 Black, White and
red soldier creature tokens. X is the played
creature's mana cost.
{t}: Target creature becomes the color of your
choice until end of turn.