Murmur, Kenku Plaguelord

Deathtouch, Lifelink, Reach
Artifact and enchantment spells you cast enter
the battlefield with an egg counter on them.
Whenever a permanent you control with an egg counter on it is put into the graveyard from the battlefield, create a 1/1 black Kenku Horror
creature token that has "When Murmur leaves
the battlefield, exile this creature."