And in order to dig them up you need drills. The diversity of depth and soil type requires you to use different types of drills. The use of cards and items in Caballa Island is truly diverse as it can be one of the basic requirements for playing the game as well as essential key for advancing to higher level. Drill System can only be experienced in Trickster and is realized through ATD (Active Time Drilling) System unique to Trickster.