Pearl of power
@JeremyECrawford Would a pearl of power still be usable by a warlock of level 7+? — Jonathan Longstaff (@pukunui81) April 6, 2015 I'd allow a pearl of power to take an expended spell slot of 4th level or higher and turn it into a 3rd-level slot. https://t.co/8yr9GdBF2l — Jeremy Crawford (@JeremyECrawford) May 7, 2015