At the beginning of combat on your turn, if you both own and control this creature and a creature named Midnight Scavengers, exile them, then meld them into Chittering Host.
//
Meld Partner: Midnight Scavengers
When Melded, it becomes the following:
Chittering Host
Creature — Eldrazi Horror
Haste
Menace (This creature can't be blocked except by two or more creatures.)
When Chittering Host enters the battlefield, other creatures you control get +1/+0 and gain menace until end of turn.