The Monster Storage building which allows players to store additional monsters outside of the main inventory. It starts out with 10 slots and can be expanded, 10 slots at a time, up to a maximum of 750. Players can choose to upgrade the building with either Mana Stones or Crystals.
Monsters in XP Buildings cannot be placed in this building, nor can they be used for power-up or battles. Monsters in storage must be removed before they can be used.
- Each Upgrade of the Monster Storage increases its capacity by 10.