Yeah. I found myself with a strange BUFF, or active magic effect on the screen. Something like a chance to create duplicated potions. Dudes, what is this? I can't find out anymore because I delete this save and re-newed my char.

What is and how do I get it again?

I can't even damn remember the name of the effect.

Sinderion's Serendipity. You get it for completing "Returning to your roots" in blackreach

Thanks! I'll save the info.