Problems with making abilities

So I'm very new to this modding stuff and I was making some abilities. I was looking a way to create a passive skill which would have a chance to bash. And so that the bash would also deal damage. I haven't found a way yet so I decided to ask for help.

Also I am stuck with doing abilities similiar to Puck's Waning rift. Like an AoE No Target ability with an effect like silence with duration and damage.