Changes

:''See also: [[The Mines#Infested Floors]]''

:''See also: [[The Mines#Infested Floors]]''

[[File:Prehistoric Level.png|180px|thumb|right|A Prehistoric Floor]]

[[File:Prehistoric Level.png|180px|thumb|right|A Prehistoric Floor]]

Prehistoric floors are a type of infested floor containing mainly [[Pepper Rex]] monsters. [[Mutant Fly|Mutant flies]] and [[Bats|Iridium Bats]] can also spawn and attack the player there. [[Dinosaur Egg]]s and [[Fiddlehead Fern]]s can be foraged on Prehistoric floors. Foliage on this floor has a chance to yield an [[Ancient Seed]] when cut down. There is a ~2.2% chance to encounter a prehistoric floor at and below floor 7.<ref name="dinofloor" />

Prehistoric floors are a type of infested floor containing mainly [[Pepper Rex]] monsters. [[Mutant Fly|Mutant Flies]] and [[Bats|Iridium Bats]] can also spawn and attack the player there. [[Dinosaur Egg]]s and [[Fiddlehead Fern]]s can be foraged on Prehistoric floors. Foliage on this floor has a chance to yield an [[Ancient Seed]] when cut down. There is a ~2.2% chance to encounter a prehistoric floor at and below floor 7.<ref name="dinofloor" />

Because prehistoric floors are infested, all enemies on this floor must be killed before a ladder appears.

Because prehistoric floors are infested, all enemies on this floor must be killed before a ladder appears.

==Treasure Rooms==

==Treasure Rooms==

Small rooms containing treasure chests, similar to those in [[The Mines]], can randomly appear at floors 10+. [[Luck#Daily Luck|Daily luck]] and [[Luck#Luck Buffs|Luck Buffs]] affect the chance to find Treasure Rooms.

Small rooms containing treasure chests, similar to those in [[The Mines]], can randomly appear at floors 10+. [[Luck#Daily Luck|Daily luck]] and [[Luck#Luck Buffs|luck buffs]] affect the chance to find Treasure Rooms.

The probability of encountering one when entering a new floor equals to <code>0.01 + (Daily Luck / 10) + (Luck Buffs / 100)</code><ref name="dinofloor" />. This means Treasure Rooms have a base chance of 1% to appear with daily [[Luck]] increasing the chance by 1% at best or decreasing by 1% at worst, with the [[Special Charm]] adding 0.25%, and food buffs adding 1% for every point of Luck. In multiplayer, the luck values taken into account are the average of luck stats of players present in the Skull Cavern.

The probability of encountering one when entering a new floor equals to <code>0.01 + (Daily Luck / 10) + (Luck Buffs / 100)</code><ref name="dinofloor" />. This means Treasure Rooms have a base chance of 1% to appear with daily [[Luck]] increasing the chance by 1% at best or decreasing by 1% at worst, with the [[Special Charm]] adding 0.25%, and food buffs adding 1% for every point of Luck. In multiplayer, the luck values taken into account are the average of luck stats of players present in the Skull Cavern.

Floor 100 of the Skull Cavern is guaranteed to contain a treasure chest. The only exception is during the run where the player completes the [[Skull Cavern#Secret|secret]].

Floor 100 of the Skull Cavern is guaranteed to contain a treasure chest. The only exception is during the run where the player completes the [[#Secret|secret]].

Below is a table of all possible treasures that can be randomly found inside Treasure Chests in the Skull Cavern.

Below is a table of all possible treasures that can be randomly found inside Treasure Chests in the Skull Cavern.

!class="unsortable"|Image

!class="unsortable"|Image

!Name

!Name

!Number in Chest&nbsp;

!Quantity&nbsp;

!Chance <ref name="treasureroomchance" />&nbsp;

!Chance <ref name="treasureroomchance" />&nbsp;

|-

|-

==Trivia==

==Trivia==

* The plaques that can be occasionally found on the walls contain [[Secrets#Skull Cavern Plaques|enciphered messages]].

* The plaques that can be occasionally found on the walls contain [[Secrets#Skull Cavern Plaques|enciphered messages]].

* To reach the [[#cite_note-integerlimit-1|deepest floor of Skull Cavern]], the [[Quarry Mine]] Floor would need to be bypassed, which has no ability to produce a ladder. This floor is coded as 77377, and can be found at floor 77257 of the Skull Cavern, (which counts floor 1 as floor 121 internally). <ref name="quarryMineShaft" />

* To reach the [[#cite_note-integerlimit-1|deepest floor of Skull Cavern]], the [[Quarry Mine]] Floor would need to be bypassed, which has no ability to produce a ladder. This floor is coded as 77377, and can be found at floor 77257 of the Skull Cavern, (which counts floor 1 as floor 121 internally).<ref name="quarryMineShaft" />

* Starting at floor 880, [[Bats|Iridium Bats]] will become red bats and have double health and faster speed.<ref name="deepbats" />

* Starting at floor 880, [[Bats|Iridium Bats]] will become red bats and have double health and faster speed.<ref name="deepbats" />