Is Grateful Apparition legal in Standard, Modern, and Commander?

Grateful Apparition is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Grateful Apparition

Q: What type of card is Grateful Apparition?

Grateful Apparition is a Creature — Spirit. Its oracle text reads: "Flying Whenever this creature deals combat damage to a player or planeswalker, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)"

Creature — Spirit

Flying

Whenever this creature deals combat damage to a player or planeswalker, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Set Commander Masters

Rarity Uncommon

Mana Value 2

Artist Izzy

Collector # 824

Scryfall Gatherer