Is Spoils of War legal in Standard, Modern, and Commander?

Spoils of War is legal in: Legacy, Vintage, Commander.

Spoils of War

Q: What type of card is Spoils of War?

Spoils of War is a Sorcery. Its oracle text reads: "X is the number of artifact and/or creature cards in an opponent's graveyard as you cast this spell.Distribute X +1/+1 counters among any number of target creatures."

Sorcery

X is the number of artifact and/or creature cards in an opponent's graveyard as you cast this spell.<br>Distribute X +1/+1 counters among any number of target creatures.

Set Ice Age

Rarity Rare

Artist Pete Venters