noobish question

[Poison elf]

First character I built I thought it might give some perk if ya got everything. Soon to find out it just filled the open slots, and nothing was gained from having every single one.

Treasure doesn't have to do with any skill unlocks.

If you look under treasure in your bar you can see what ones you have found. There are 8 types, with differant amounts and duplicates to finish each. Last one opens up at 33.