Is Space Marine Scout legal in Standard, Modern, and Commander?

Space Marine Scout is legal in: Legacy, Vintage, Commander.

Space Marine Scout

Q: What type of card is Space Marine Scout?

Space Marine Scout is a Creature — Astartes Scout. Its oracle text reads: "First strike, vigilance Concealed Position — When this creature enters, if an opponent controls more lands than you, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle."

Creature — Astartes Scout

First strike, vigilance

Concealed Position — When this creature enters, if an opponent controls more lands than you, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

Set Warhammer 40,000 Commander

Rarity Uncommon

Mana Value 3

Artist Games Workshop

Collector # 15

Scryfall Gatherer