@Ahh_I_Died @JeremyECrawfordIs Pearl of Power useless on a 7th level Warlock since their spell slots are 4th level? I believe the pearl would not provide a benefit – could allow it to provide a lower level one as house rule
— Mike Mearls (@mikemearls) February 2, 2016
The pearl of power is warlock-friendly, thanks to the DMG errata: https://t.co/kuNYh24QEY #DnD https://t.co/aePmL7nWLM
— Jeremy Crawford (@JeremyECrawford) February 2, 2016