Dark Invocation; 8th; Blast Shape
This blast shape invocation allows you to invoke your eldritch blast as the dreaded eldritch doom. This causes bolts of mystical power to lash out and savage nearby targets. An eldritch doom deals eldritch blast damage to any number of targets designated by you and within 20 feet. This is not a ray attack, so it requires no ranged touch attack. Each target can attempt a Reflex save for half damage.
Source: Complete Arcane