Al Ana, Bushi of Onakke Crypt

All creatures you control are black and have deathtouch.
{7}{b/r}, {t}: Sacrifice all other creatures you control.
Al Ana, Bushi of Onakke Crypt deals damage
equal to twice the number of creatures sacrificed divided as you choose any number of targets.
Whenever you sacrifice a creature, each player discards a card. This ability can only trigger
twice each turn.