Miraak's Ichormoon Staff

Dragonborn creatures and Planeswalkers you control gain the following:
"{1}{t}/[0]: Proliferate" and
"{3}{t}/[-12]: Take an extra turn after this one."
Whenever you cast a noncreature spell, choose
a counter on target permanent. Put an additional counter of that kind on that permanent.
(Based on Ichormoon Gauntlet)