heres a guide for u guys on how to make +13 items
STEP1(+10):talk to the chaos goblin located in NPcs noria
there put 1 chaos the item 1 soul and 1 bless
ull produce +10 item
STEP2(+11):talk to the chaos goblin located in NPCs noria
there put 1 chaos 2 bless 2 souls and the +10 item
and ull make +11 item
STEP3(+12):talk tp the chaos goblin located in noria
there put 1 chaos 3 souls 3 bless and the +11 item
ull make +12 item
STEP4(+13 the last):talk to the chaos goblin in noria
there put 1 chaos 4 souls 4 bless and the +12 item
ull make +13 item
NOTE:click only the regular item combination
and if you failed to create them all the items you used are gone
xD bad
if you successs youll have the powerfull item
depends on the item u are using
xD
hope it helps