They can only occur in the Skull Cavern, and the predictor will check up to level 500 for them. Dinosaur levels were also added in 1.4 these have a grassy tileset and are primarily inhabited by Pepper Rex.These can only happen if the quarry itself has been unlocked and will override other types of infestations, so the predictor only calculates them if the save has quarry access. Quarry levels were added in 1.4 this is when the level uses the gray quarry mine tileset and spawns grey & brown slimes as well as Haunted Skulls.Monster and slime infestations are persistent in all versions and can be revisited multiple times per day.Mushroom levels respawn in version 1.3 and earlier, but starting in 1.4, mushrooms will only appear on your first visit.
This calendar showss the prediction of various special levels in
