Is Portcullis legal in Standard, Modern, and Commander?

Portcullis is legal in: Legacy, Vintage, Commander.

Portcullis

Q: What type of card is Portcullis?

Portcullis is an Artifact. Its oracle text reads: "Whenever a creature enters, if there are two or more other creatures on the battlefield, exile that creature. Return that card to the battlefield under its owner's control when this artifact leaves the battlefield."

Artifact

Whenever a creature enters, if there are two or more other creatures on the battlefield, exile that creature. Return that card to the battlefield under its owner's control when this artifact leaves the battlefield.

Set Stronghold

Rarity Rare

Mana Value 4

Artist Kev Walker

Collector # 139

Scryfall Gatherer