Is Keeper of the Cadence legal in Standard, Modern, and Commander?

Keeper of the Cadence is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Keeper of the Cadence

Q: What type of card is Keeper of the Cadence?

Keeper of the Cadence is a Creature — Human Wizard. Its oracle text reads: "{3}: Put target artifact, instant, or sorcery card from a graveyard on the bottom of its owner's library. *"What you call magic, I call the power of memory."* Power/Toughness: 2/5"