Is Tears of Rage legal in Standard, Modern, and Commander?

Tears of Rage is legal in: Modern, Legacy, Vintage, Commander.

Tears of Rage

Q: What type of card is Tears of Rage?

Tears of Rage is an Instant. Its oracle text reads: "Cast this spell only during the declare attackers step. Attacking creatures you control get +X/+0 until end of turn, where X is the number of attacking creatures. Sacrifice those creatures at the beginning of the next end step."

Instant

Cast this spell only during the declare attackers step.

Attacking creatures you control get +X/+0 until end of turn, where X is the number of attacking creatures. Sacrifice those creatures at the beginning of the next end step.

Set Darksteel

Rarity Uncommon

Mana Value 4

Artist Pete Venters

Collector # 70

Scryfall Gatherer