@JeremyECrawford do the level requirements for Warlock Invocations reference Warlock level, or total character level?

— Justin Yanes (@Jyuasnteisn) August 11, 2016

Warlock invocations are based on warlock level—a correction made in the PH errata: https://t.co/vzc7twThef #DnD https://t.co/X1yp5XVCs2

— Jeremy Crawford (@JeremyECrawford) August 12, 2016