How do I make this swords ability damage to be considered player damage.

So Basically I have this sword that has a right click ability that teleports 8 block and deals damage to mobs around me, but when i kill a mob that I made to drop specific items with the ability damage it only drops the default stuff because its considered non-player damage I think?  

 So in conclusion how do I make the ability damage to be Considered Player Damage.