Is Deepfathom Skulker legal in Standard, Modern, and Commander?

Deepfathom Skulker is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Deepfathom Skulker

Q: What type of card is Deepfathom Skulker?

Deepfathom Skulker is a Creature — Eldrazi. Its oracle text reads: "Devoid (This card has no color.) Whenever a creature you control deals combat damage to a player, you may draw a card. {3}{C}: Target creature can't be blocked this turn. ({C} represents colorless mana.)"