Eldritch Doom

Warlock Invocation
Level: Dark, 8th
Components: V, S
Casting Time: 1 standard action
Range: 60 feet
Area: 20 foot radius
Duration: Instant
Saving Throw: Ref for half dmg
Spell Resistance: Yes

You deal damage equal to your eldritch blast to any number of creatures you choose within a 20ft radius. Targets may attempt a reflex save for half damage.

(Complete Arcane, Page 134)