Y'chak's Thousand Rays

Prerequisite

9th level, eldritch blast cantrip

Description

When you cast the Eldritch Blast cantrip, you can choose to unleash a torrent of lesser rays in a burst before you. Each creature in a 30-foot cone centered on you must make a Dexterity saving throw. A creature takes 1d10 force damage for each beam of your eldritch blast cantrip on a failed save, or half as much damage on a success.
Any Eldritch Invocation which effects your eldritch blast cnatrip effects this invocation. If you have the Eldritch Spear invocation, the area of this spell is a 60-foot cone.