Is Chittering Host legal in Standard, Modern, and Commander?

Chittering Host is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Chittering Host

Q: What type of card is Chittering Host?

Chittering Host is a Creature — Eldrazi Horror. Its oracle text reads: "Haste Menace (This creature can't be blocked except by two or more creatures.) When this creature enters, other creatures you control get +1/+0 and gain menace until end of turn."