Is Threnody Singer legal in Standard, Modern, and Commander?

Threnody Singer is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Threnody Singer

Q: What type of card is Threnody Singer?

Threnody Singer is a Creature — Siren. Its oracle text reads: "Flash Flying When this creature enters, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) Power/Toughness: 1/3"

Creature — Siren

Flash

Flying

When this creature enters, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue. (Each in the mana costs of permanents you control counts toward your devotion to blue.)

Power/Toughness: 1/3

Set Theros Beyond Death

Rarity Uncommon

Mana Value 2

Artist PINDURSKI

Collector # 75

Scryfall