Ice

Ice, ., is formed when a pool is frozen by a spell or wand of cold. It is slippery, and when you are walking on it, you have the same effect as when wearing gauntlets of fumbling or fumble boots.

Beware fire-breathing monsters, wands of fire, fire traps and such effects if you are on ice; those will melt it.

Corpses rot slower if they're on ice.