Making +12 ~ +15

To make ur weapon from +11 to +12 ~ +15 go to NPC Alchemist Odin in the area for doing clue.

Slot A – Lak Pack or Protection emblem

Slot B – +11 weapon or armour

Slot C –  any Secret Stone or Bless_refining

Success u will get the below option

 +12 – Basic +150% Additional Option +150 %

+13 – Basic +180% Additional Option +180%

+14 – Basic +220% Additional Option +220%

+15 – Basic +270% Additional Option +270 % 

Failure

-Items will disappear

– Or item’s Grade will decreased by 1