1. Dig for treasures in the treasure house 2. Play a clearance station with the master of the same guild. After playing, you will receive it in the task list.

3. Get the magic tower cards randomly (win first, but the chance is very small. I only have one time. I defeated the cards after the 15th floor of the magic tower. It is possible anyway, but the chance of getting it on the BOSS level is greater)