Is Gargoyle Flock legal in Standard, Modern, and Commander?

Gargoyle Flock is legal in: Legacy, Vintage, Commander.

Gargoyle Flock

Q: What type of card is Gargoyle Flock?

Gargoyle Flock is a Creature — Tyranid Gargoyle. Its oracle text reads: "Flying Skyswarm — At the beginning of your end step, if a creature entered the battlefield under your control this turn, create a 1/1 blue Tyranid Gargoyle creature token with flying."

Creature — Tyranid Gargoyle

Flying

Skyswarm — At the beginning of your end step, if a creature entered the battlefield under your control this turn, create a 1/1 blue Tyranid Gargoyle creature token with flying.

Set Warhammer 40,000 Commander

Rarity Rare

Mana Value 4

Artist Nikola Matkovic

Collector # 123

Scryfall Gatherer