Is Shriekmaw legal in Standard, Modern, and Commander?

Shriekmaw is legal in: Modern, Legacy, Vintage, Commander.

Shriekmaw

Q: What type of card is Shriekmaw?

Shriekmaw is a Creature — Elemental. Its oracle text reads: "Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) When this creature enters, destroy target nonartifact, nonblack creature. Evoke {1}{B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)"