Final Word

When this unit is destroyed by a champion with an attack, the champion that destroyed it is also destroyed.

this is incorrect, I used drive on it to kill it and my champ died. It was not an attack so please fix description

 

I used aura and i trigered it too.... others skills are too buged too many skills

 

Ablities that actually do damage are often seen as an attack ability and yes that is unclear. To be safe kill with a relic, spell, terrain effect. I don't know if aoe (bombs etc) would trigger the effect.
If I recall correctly there was a bug that even units with defile corpse would even be affected by final word.