Castle owners have the opportunity to use Castle Mix

namely, the Guild Master or his Assistant.

You can use Castle Mix once a day.

To do this, you need to enter the throne room, go up and talk to the Elder. Select the "Store" tab.

To prepare, you will need 30 Jewel of Guardian in the set and 50kk Zen.

As a result, one of the things will be cooked 

Evolution Items, Weapon Items, Wing of Fatality, Castle Cloack, Fallen Angel Wings, Pet Nix.