True Ice

In the deep north, and at the peaks of the highest mountains, the raw cold of the elemental plane of ice seeps through into the prime material. Suppressed to an unfathomably low temperature, the ice that forms there loses it's ability to thaw. Known as true ice, items built of this material can withstand the fiery heart of a volcano, never mind the heat of the sun.

The enormous density of true ice makes it heavier than lead and stronger than steel. Though it looks much like regular ice, it's darker, stormier interior betrays its nature. A room containing true ice instantly feels chillier, and a creature in contact with true ice feels as though it's vital force is being drained from it's body.

• True ice never melts, and it's immune to any effect that would harm it due to heat. Any nonmagical flames that come within 5 feet of true ice are automatically extinguished, and any creature that come into contact with it has its speed reduced by 10 feet until its next turn. Worn and carried items usually include padding that protects the owner from this effect.
• Weapons made of true ice deal cold damage rather than their regular damage type, and a creature hit by one has its speed reduced by 10 feet until it's next turn due to the natural property of true ice.
• Creatures wearing armor made of true ice have resistance to fire damage.