Is Tome of the Guildpact legal in Standard, Modern, and Commander?

Tome of the Guildpact is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Tome of the Guildpact?

Tome of the Guildpact is an Artifact. Its oracle text reads: "Whenever you cast a multicolored spell, draw a card. {T}: Add one mana of any color. *"Reading it has given me a glimpse of what makes this deeply flawed city so very magnificent." —Dovin Baan*"