Is Sanity Grinding legal in Standard, Modern, and Commander?

Sanity Grinding is legal in: Modern, Legacy, Vintage, Commander.

Sanity Grinding

Q: What type of card is Sanity Grinding?

Sanity Grinding is a Sorcery. Its oracle text reads: "Chroma — Reveal the top ten cards of your library. For each blue mana symbol in the mana costs of the revealed cards, target opponent mills a card. Then put the cards you revealed this way on the bottom of your library in any order."

Sorcery

Chroma — Reveal the top ten cards of your library. For each blue mana symbol in the mana costs of the revealed cards, target opponent mills a card. Then put the cards you revealed this way on the bottom of your library in any order.

Set Eventide

Rarity Rare

Mana Value 3

Artist Lars Grant-West

Collector # 29

Scryfall Gatherer