[Solved] HELP! Killed Unit Reward System

[NoNicknamesAvailable]

Can someone Help me
I have a Unit and When the unit is killed i want to Give a Buff to The killing unit....But i can't find the "killing unit" in trigger.. how can i create a trigger that gives something to the killer of a specific unit?

 

[Pyrogasm]

It’s right there under event responses.