Mana Vault

A mana vault is a very rare and special type of passable terrain found only in Dungeon Keeper 2. It is recognizable by a hole in the ground from which individual blue-green sparkles and periodic ring-shaped clouds of sparkles emit. When claimed by a Keeper's Imp, the ring-shaped clouds turn the owner's color, and each mana vault increases its owner's mana influx by +100 per turn, even beyond the normal +500 per turn maximum for owned territory.
File:Mana Vaults neutral Dungeon Keeper 2.png|A cluster of unclaimed Mana Vaults
File:Mana Vaults claimed Dungeon Keeper 2.png|The same cluster, after they have been claimed.