Noxious Blast

Prerequisite

eldritch blast cantrip

Description

As a bonus action, you cause sickening vapor to pervade your fingertips. The next time you cast eldritch blast, each of its attacks deal poison damage instead of force damage. Each target hit by these attacks must succeed on a Constitution saving throw or be poisoned for up to 1 minute. At the end of each of the target’s turns, it can make another Constitution saving throw. On a success, this effect ends.
You lose the benefits of this eldritch invocation if you use a different eldritch invocation that changes the damage type of your eldritch blast before you cast the cantrip.