Meldraina, Traitor to Angels

Flying, First Strike, Lifelink
Whenever you attack with a creature, you
may pay life equal to it's power. If you do, double it's power and toughness until end
of turn.
{3}{w/b}{b/r}{r/w}: Untap up to two target creatures. After this phase, there is an additional
combat phase. Activate only once each turn.