Is Damping Sphere legal in Standard, Modern, and Commander?

Damping Sphere is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Damping Sphere?

Damping Sphere is an Artifact. Its oracle text reads: "If a land is tapped for two or more mana, it produces {C} instead of any other type and amount. Each spell a player casts costs {1} more to cast for each other spell that player has cast this turn."