A tentacle pool is a pool of slimy water that can be built in a player-owned house's Oubliette. When challenge mode is on in the dungeon, players who fall in the dungeon will be attacked by a tentacle-like creature, and it can inflict from 0-4 hitpoints damage. It cannot be attacked back. If challenge mode is not on, however, the player will just 'swim' in the pool.
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| Prisons |
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| Guards |
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| Ladders | |
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| Lighting | |
