Drill Ground

Requirements
Library and stable of same level before upgrade (academy is also needed to build library and stable)

Normal Function

 * Allows you to play minigames.
 * Choice of minigames is directly related to building level, each level adds a minigame
 * You get based on your score which can be traded for items or XP

Siege War Function
can be used to increase merit gain

Max level is 10, all levels costs the same