Is Sage of Days legal in Standard, Modern, and Commander?

Sage of Days is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Sage of Days

Q: What type of card is Sage of Days?

Sage of Days is a Creature — Human Wizard. Its oracle text reads: "When this creature enters, look at the top three cards of your library. You may put one of those cards back on top of your library. Put the rest into your graveyard."

Creature — Human Wizard

When this creature enters, look at the top three cards of your library. You may put one of those cards back on top of your library. Put the rest into your graveyard.

Set The Lost Caverns of Ixalan

Rarity Common

Mana Value 3

Artist Aldo Domínguez

Collector # 73

Scryfall Gatherer