Is Alora, Merry Thief legal in Standard, Modern, and Commander?

Alora, Merry Thief is legal in: Legacy, Vintage, Commander.

Alora, Merry Thief

Q: What type of card is Alora, Merry Thief?

Alora, Merry Thief is a Legendary Creature — Halfling Rogue. Its oracle text reads: "Whenever you attack, up to one target attacking creature can't be blocked this turn. Return that creature to its owner's hand at the beginning of the next end step. Choose a Background (You can have a Background as a second commander.)"

Legendary Creature — Halfling Rogue

Whenever you attack, up to one target attacking creature can't be blocked this turn. Return that creature to its owner's hand at the beginning of the next end step.

Choose a Background (You can have a Background as a second commander.)

Set Commander Legends: Battle for Baldur's Gate

Rarity Uncommon

Mana Value 3

Artist Aaron Miller

Collector # 55

Scryfall Gatherer