Elementalist Staff

Equip {3}
Whenever you cast an instant or sorcery spell, if Elementalist Staff is equipped to a creature, you may create a 2/2 blue Elemental creature token.
Heirloom {3} (If Elementalist Staff would leave the battlefield, you may pay {3}. If you do, create a token that is a copy of Elementalist Staff except it doesn't have this ability.)