Dreadlord Whitney, Equestrian

As an additional cost to cast this spell, sacrifice X
creatures. This spell cost {2} less to cast for each
creature sacrificed this way.
Decayed (This creature can't block. When it
attacks, sacrifice it at the end of combat.)
Whenever Equestrian Whitney attacks, you lose
1 life and draw a card. Then each opponent loses
1 life and discards a card.