Is Vile Requiem legal in Standard, Modern, and Commander?

Vile Requiem is legal in: Legacy, Vintage, Commander.

What type of card is Vile Requiem?

Vile Requiem is an Enchantment. Its oracle text reads: "At the beginning of your upkeep, you may put a verse counter on this enchantment. {1}{B}, Sacrifice this enchantment: Destroy up to X target nonblack creatures, where X is the number of verse counters on this enchantment. They can't be regenerated."

Vile Requiem

Enchantment

At the beginning of your upkeep, you may put a verse counter on this enchantment.

, Sacrifice this enchantment: Destroy up to X target nonblack creatures, where X is the number of verse counters on this enchantment. They can't be regenerated.