Nirzgag, the Gluttony Spawn

Sacrifice Nirzgag: Add {c} equal to its toughness.
{1}{c}: Nirzgag becomes a Eldrazi Drone with base
power and toughness 4/5 and ingest.
{2}{c}: If Nirzgag has ingest, it gains "Whenever Nirzgag deals combat damage to a player create
that many 0/1 Eldrazi Spawn creature token."
They have "Sacrifice this creature: Add {c}. "
{5}{c}: If Nirzgag is a Drone, it becomes a Legend Creature-Eldrazi with base power and toughness 10/11, trample, and annihilator 2.