Ret'Ila, Shield of Seraphina

Defender
{2}{w/u}{r/w}: If white was spent to activate this ability,
target creature assigns no combat damage this
turn. If red was spent to activate this ability,
target blocked creature deals damage equal to its
power to it's controller. If blue was spent to
activate this ability, return target creature you
control to its owner's hand. Gain 3 life.