Soul of Kaladesh

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating
mana abilities pays for {1}.)
{2}{u}{r},{t}: You get {e} for each artifact you control.
Pay {e}{e}{e}{e}{e}{e}: Target artifact you control gets an additional counter of each kind of counter on it. Then, do this for each other artifact you control.