Board Thread:Game Discussion/@comment-192.107.46.241-20130703015436/@comment-10812845-20130703022802

Cube farming is playing the episodes using the strategy of adding as many battle cubes as possible to your inventory. Usually this is done by using the regen cubes to finish a boss and add the reward cube to your inventory.

level 3 and 4 cards are not compatible. it is like that are completely different characters.