Detecting Backstab damage (Wind Walk)

[SutinG]

Hi,
I Want to make a trigger that detect if a unit was killed by the backstab damage of the Wind Walk. It's possible?

Thanks in advance!

 

[Sessional]

Set a boolean to true when the unit gains the Wind Walk buff, and set it to false when it's lost.
If the value is true when the unit dies, backstabbed.