New Notable Passive Mechanic/Item Mod Idea

Either expensive currency/omen or difficult endgame mechanic that lets you add mod to amulets: spec out (1—?)# nodes from instilled notable passives.

Maybe a juiced version of current league's Vaal temples could have a special room with chance to have one of those item modifier pillars roll with the extra notable passive nodes mod?

Picking up those extra lil bits of immobilisation or crit chance would be nice, and doesn't seem too game-breaking to me.