Eldritch Hex

After you hit the target with a Pact Weapon, you strike it with a burst of crackling energy. 

The target takes 2d10 Force damage and is pushed 10 feet if Huge or smaller. The push can stack with other effects (Weapon Mastery etc).  

Damage increases at higher character levels. The damage increases to 3d10 at character level 5, 4d10 at level 9, 5d10 at level 13 and 6d10 at level 18.