Occasionally you will enter an infested floor filled with slimes or a mix of monsters. Unlike normal floors, there are no rocks and in slime-infested floors the walls and ground are covered in green slime rather than the normal themes. Forage-able items such as quartz or mushrooms may still be found though. To proceed from an infested floor, you must continue to fight until all monsters are killed (this includes [[Duggy|duggies]] that may be hidden under dirt patches), at which point a ladder will appear either where the last monster was killed or next to the entrance (the player will be notified with a message saying, "A way down has appeared").
A [[Staircase]] can also be used to escape an infested floor.
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[[階段]]を使用することでもモンスターフロアから脱出できる。
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An infested floor will always be on the same level for each day and goes up one level the next day. For example, if an infested floor is found on level 54 one day, it will be on 53 the next day, 52 the day after that, and so on. On some days, an infested floor might not be found because certain floors are excluded from being infested. These include elevator/treasure floors and the first five, last ten, and nineteenth floor of each section (refer back to the information about sections in [[The_Mines#Floors|Floors]]). There can be multiple infested floors at once, each are generally around twenty or more floors apart.