Obsidian Item of Greater Unlearning

This item can be used to reclaim experience spent on an entire skill tree or category by reducing the skills in a tree or category to their minimum levels, and returing experience spent on those skills to your experience pool.

Effect
Reset skill points - reduce all skills down to the minimum level and recover 100% of the experience points used to level it. These points are returned to your experience pool so they can be used to increase other skill levels. Note that, just as with manually unlearning skills, if you have a child skill, its parent skill cannot be Unlearned below that child skills’ required skill level. For example, the Bladed Combat skill will not decay below level 20, as child skills like Riposte require Bladed Combat be at least that level.