Is Gangrenous Zombies legal in Standard, Modern, and Commander?

Gangrenous Zombies is legal in: Legacy, Vintage, Commander, Pauper.

Gangrenous Zombies

Q: What type of card is Gangrenous Zombies?

Gangrenous Zombies is a Creature — Zombie. Its oracle text reads: "{T}, Sacrifice Gangrenous Zombies: Gangrenous Zombies deals 1 damage to each creature and each player. If you control a snow Swamp, Gangrenous Zombies deals 2 damage to each creature and each player instead."

Creature — Zombie

, Sacrifice Gangrenous Zombies: Gangrenous Zombies deals 1 damage to each creature and each player. If you control a snow Swamp, Gangrenous Zombies deals 2 damage to each creature and each player instead.