Is Skrelv, Defector Mite legal in Standard, Modern, and Commander?

Skrelv, Defector Mite is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Skrelv, Defector Mite?

Skrelv, Defector Mite is a Legendary Artifact Creature — Phyrexian Mite. Its oracle text reads: "Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Skrelv can't block. {W/P}, {T}: Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. ({W/P} can be paid with either {W} or 2 life.) Power/Toughness: 1/1"

Skrelv, Defector Mite

Legendary Artifact Creature — Phyrexian Mite

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)

Skrelv can't block.

, : Choose a color. Another target creature you control gains toxic 1 and hexproof from that color until end of turn. It can't be blocked by creatures of that color this turn. ( can be paid with either or 2 life.)