Is Plate Armor legal in Standard, Modern, and Commander?

Plate Armor is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Plate Armor

Q: What type of card is Plate Armor?

Plate Armor is an Artifact — Equipment. Its oracle text reads: "Equipped creature gets +3/+3 and has ward {1}. (Whenever equipped creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.) Equip {3}. This ability costs {1} less to activate for each other Equipment you control. ({3}: Attach to target creature you control. Equip only as a sorcery.)"

Artifact — Equipment

Equipped creature gets +3/+3 and has ward . (Whenever equipped creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)