Emerson, Heir of the Aviary

Devoid (This creature is colorless)

Deathtouch, Protection from Creatures.
Emerson has Indestructible and Hexproof as long as
you control an Eldrazi creature. Eldrazi you control
get +3 /-1

{x} {t} pay 5 life create X 1/2 Bird Eldrazi with
flying, annihilator {1} and "This creature can't be
blocked by any creature without activated abilities"
then amass Eldrazi 3