Piper of the Pranksters

Multikicker {2}(You may pay an additional {2} any number of times as you cast this spell.)
When Piper of the Pranksters enters the battlefield, for each time it was kicked,
put a 1/1 white and blue Eldrazi
Prankster Artifact creature token into play.
The tokens have "When this creature dies, untap target permanent you control."