Is Keldon Twilight legal in Standard, Modern, and Commander?

Keldon Twilight is legal in: Legacy, Vintage, Commander.

Keldon Twilight

Q: What type of card is Keldon Twilight?

Keldon Twilight is an Enchantment. Its oracle text reads: "At the beginning of each player's end step, if no creatures attacked this turn, that player sacrifices a creature of their choice that they controlled since the beginning of the turn."

Enchantment

At the beginning of each player's end step, if no creatures attacked this turn, that player sacrifices a creature of their choice that they controlled since the beginning of the turn.

Set Planeshift

Rarity Rare

Mana Value 3

Artist Franz Vohwinkel

Collector # 112

Scryfall Gatherer