Crest of Aerona

Extort (Whenever you cast a spell, you may
pay {w/b}. If you do, each opponent loses 1 life
and you gain that much life.)
{t}: Add {w} or {b} to your mana pool.
{w/b}, {t}, Sacrifice Crest of Aerona: Target creature
you control gains deathtouch until end of turn.
The symbol of Aerona carries the authority of the
empire, and a warning of trouble.