Lira Roselica, Coven Exile

{t}{w/b}{w/b} Whenever you gain life this turn, each opponent loses that much life.
{t}{b/r}{b/r}{b/r} Sacrifice a creature. Copy target instant
or sorcery.
{t}{u/r}{u/r}{u/r}{u/r} Exile target instant or sorcery from
target players graveyard. You may cast it until
your next turn.
{t}{w}{w}{u}{u}{b}{b}{r}{r} Sacrifice Lira. Deal X
damage to X targets where X is equal to the
number of cards players own in exile.