The Enhancer

The Enhancer room you can find if you step opposite Lost City bank through the red portal there.

After entering the red portal you will be teleported to the enhancer room.

Go near any of the 4 soul forges there and doubleclick it.

A window will pop up then you click the blue bottom and select the weapon you wish to upgrade.

You will see on the left side of the window your chance of success right to it how many Badge of Slaying it will cost you.

You can upgrade any weapons minimum and maximum weapon damage by 1 if you succeed.

If you have 3 times succeeded on enhancing a weapon and you fail it will go dow by 1.

The chance of a successful upgrade goes down with the number of upgrades the item has already archieved.

1-3_____50% Success chance

4-6_____40% Success chance

7-9_____30% Success chance

10-12___20% Success chance

13-??___10% Success chance

You will never lose or destroy the item you can only lose BoS and many of them. Luck or beeing stuffed has no effect on the success chance it is only real luck like on a gambling stone. There is no upper limit so far how often u can upgrade if you just have the badges of slaying for it.