Arcane Experimentation / Artificer's Insight help

I assume this is the subreddit to ask this on, considering the fact I saw a post from 10 yrs ago about the same skills.

How do I use these powers? I have the daggers and (filled) soulgems, but anytime I press Z it uses the power - so it goes on CD - but nothing else. No special daggers, nothing.

Am I doing something wrong??