Dreg, Consuming Lizardman

Haste, Deathtouch, Annihilator 7
{3}{g}{t} Sacrifice 4 target creatures. Add a number of food tokens equal to the
number of each sacrificed creature.
Sacrifice a token: Gain 5 life.
(Dreg, Consuming Lizardman's power is
equal to the number of permanents on the field)