Imbue with Flames

Target creature gains +3/+3 until end of turn.
Purity {w} - Up to two target creatures gain
+3/+3 until end of turn instead.
Purity {r} - Targeted creature also gains double
strike until end of turn.
(When this card is cast, if its cost was paid using
mana of only one color, activate the Purity effect of
the color of mana spent.)