Level 49 of the Caverns of Chaos is called the frictionless level by many players. It is covered with ice that is too slippery to cross by normal means. Spiked boots do not help. Teleportation fails on this level. No monsters are generated here. Since the ice is (almost) frictionless, throwing objects will propel the PC in the opposite direction (remember freshman physics?). There is also a special gift available on this level. If the PC equips a potion of uselessness in the missile slot and throws it, a deity rewards the PC for finding a use for the potion with a random artifact. Note that the potion must actually propel the PC in order for this to work, so don't throw your only potion of uselessness in the wrong direction! The following messages are typical of those generated upon entering and throwing a potion of uselessness:
There is a stair leading downwards here. You climb downwards... The ground seems to be covered with a very slippery layer of ice. It's cold here! There is a stair leading upwards here. [T]arget -- [Z] Abort. (x2) The uncursed potion of uselessness thuds into an obstacle. The uncursed potion of uselessness shatters! You slide to the west. You suddenly hear a booming voice! "*YE REALLY HAST FOUND A USE FOR THIS PETTY ITEM*" "*YER INGENUITY SHALL BE REWARDED*" Something is lying before you. Out of ammunition. Reload with the heap of 14 uncursed rocks (+1, 1d4)? ([y]es, [n]o, [q]uit) q Blessed shining silver bracers (10s) are lying here. You shudder. You resist the icy blast. You pick up the blessed shining silver bracers. You sneeze. You resist the icy blast.
Monsters cannot be wished for, Necromancy cannot be applied, and reading scrolls of familiar summoning doesn't work on D: 49. However, in 1.1.1, using figurines and djinni appearing from non-blessed RoDS work normally. Monsters created in this manner have no trouble walking on the ice.In R+, there is no way to create monsters.
Use whatever is handy to travel through CoC 49, such as rocks, arrows, guaranteed returning missiles such as a boomerang, even that worthless pile of sis the PC has been dragging around forever. Do NOT use missile weapons that are not guaranteed to return such as the rune-covered trident or the Hammer of the Gods. Given the nature of CoC 49, the PC may never be able to stop exactly where they fell to retrieve them.
As of R+, wearing the moloch boots "Moloch's Thorns" allows the PC to walk on the level normally.