Is Venomous Brutalizer legal in Standard, Modern, and Commander?

Venomous Brutalizer is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Venomous Brutalizer

Q: What type of card is Venomous Brutalizer?

Venomous Brutalizer is a Creature — Phyrexian Knight. Its oracle text reads: "Toxic 3 (Players dealt combat damage by this creature also get three poison counters.) When this creature enters, you may pay {1}{G}. If you do, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)"

Creature — Phyrexian Knight

Toxic 3 (Players dealt combat damage by this creature also get three poison counters.)

When this creature enters, you may pay . If you do, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)