Is Elementalist's Palette legal in Standard, Modern, and Commander?

Elementalist's Palette is legal in: Legacy, Vintage, Commander.

What type of card is Elementalist's Palette?

Elementalist's Palette is an Artifact. Its oracle text reads: "Whenever you cast a spell with {X} in its mana cost, put two charge counters on this artifact. {T}: Add one mana of any color. {T}: Add {C} for each charge counter on this artifact. Spend this mana only on costs that contain {X}."