Is Fight or Flight legal in Standard, Modern, and Commander?

Fight or Flight is legal in: Legacy, Vintage, Commander.

Fight or Flight

Q: What type of card is Fight or Flight?

Fight or Flight is an Enchantment. Its oracle text reads: "At the beginning of combat on each opponent's turn, separate all creatures that player controls into two piles. Only creatures in the pile of their choice can attack this turn."

Enchantment

At the beginning of combat on each opponent's turn, separate all creatures that player controls into two piles. Only creatures in the pile of their choice can attack this turn.

Set Invasion

Rarity Rare

Mana Value 4

Artist Randy Gallegos

Collector # 16

Scryfall