Is Day of the Moon legal in Standard, Modern, and Commander?

Day of the Moon is legal in: Legacy, Vintage, Commander.

Day of the Moon

Q: What type of card is Day of the Moon?

Day of the Moon is an Enchantment — Saga. Its oracle text reads: "(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I, II, III — Choose a creature card name, then goad all creatures with a name chosen for this enchantment. (Until your next turn, they attack each combat if able and attack a player other than you if able.)"

Enchantment — Saga

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I, II, III — Choose a creature card name, then goad all creatures with a name chosen for this enchantment. (Until your next turn, they attack each combat if able and attack a player other than you if able.)

Set Doctor Who

Rarity Rare

Mana Value 3

Artist Skinnyelbows

Collector # 79

Scryfall Gatherer