Voidslip

As a bonus action, you envelop yourself in a mass of utter darkness and whispering madness. Until the end of your next turn, you deal an additional 3d6 Psychic damage on your melee, ranged or spell attacks. This includes spells or attacks that damages multiple creatures. Voidslip cannot be used at the same time as Shadowform.

At Higher Level. Increases the duration by one turn for each spell slot used above 3rd level.