A beam of crackling energy erupts forth from your hand, forming into a blade. The blade has a reach of 5ft, counts as a magical weapon and has the light property. Using an action you may make an attack with this blade, dealing 1d6 force damage on hit. The damage increases by an additional 1d6 at 5th, 11th and 17th level. The blade lasts until you dismiss it as a bonus action, drop it, or lose conciousness.
Eldritch Invocations that apply to Eldritch Blast also apply to Eldritch Blade, changes are listed below.
Eldritch Spear
When you cast eldritch blade, the blade you conjure has a reach of 15ft.
Grasp of Hadar
Once on each of your turns when you hit a creature with your eldritch blade, you can move that creature up to 10ft in any direction (except up) as long as they would maintain the same distance from you or move closer.