Is Sentinel Sarah Lyons legal in Standard, Modern, and Commander?

Sentinel Sarah Lyons is legal in: Legacy, Vintage, Commander.

Sentinel Sarah Lyons

Q: What type of card is Sentinel Sarah Lyons?

Sentinel Sarah Lyons is a Legendary Creature — Human Knight. Its oracle text reads: "Haste As long as an artifact entered the battlefield under your control this turn, creatures you control get +2/+2. Battalion — Whenever Sentinel Sarah Lyons and at least two other creatures attack, Sentinel Sarah Lyons deals damage equal to the number of artifacts you control to target player."

Legendary Creature — Human Knight

Haste

As long as an artifact entered the battlefield under your control this turn, creatures you control get +2/+2.

Battalion — Whenever Sentinel Sarah Lyons and at least two other creatures attack, Sentinel Sarah Lyons deals damage equal to the number of artifacts you control to target player.

Set Fallout

Rarity Rare

Mana Value 5

Artist David Astruga

Collector # 118

Scryfall Gatherer