Hungering Blade

Transmutation

Level:Warlock 3
Prerequisite: Eldritch Blade
Casting Time:1 swift action
Range:Personal
Target:Self
Duration:1 round

After casting this invocation, you gain the benefit of the Whirlwind Attack feat until the end of your turn but only while attacking with your eldritch blade. If you do not use this ability before the end of your turn, this invocation has no effect.