By Firebald at http://www.d20forge.com
Created by arctic druids to compensate for wood and metal shortages.
Invincible Ice is a magical substance made by arctic druids from normal ice. The Invincible Ice becomes as hard as steel, and resists evaporation and can only be melted by lava or prolonged exposure to magical fire. Invincible Ice must be exposed to magical fire for 2 consecutive rounds/cubic foot to cause it to melt. Any break in the exposure to magical fire resets the exposure needed to melt it. Invincible Ice cannot be fashioned into a tool, weapon or other object, but items created from ice can be turned into Invincible Ice with this spell. Thus Invincible Ice armor, weapons, bridges and even entire kingdoms can be made, and be as durable as steel versions.
Materials made of Invincible Ice are cool to the touch, but it does not absorb heat from the area around it. This makes Invincible Ice no more harmful to flesh than normal metal.
Invincible Ice has a hardness of 10, and 30hp/inch of thickness.
Making an item out of ice uses the appropriate Craft skill, but has +5 to the DC of the item crafted. Ex.: armor uses the Craft (armorsmithing) skill and has a DC of 10 + AC bonus. Invincible Ice armor also uses the Craft (armorsmithing) skill, but has a DC of 15 + AC bonus.
Material component: A bit of permafrost, and the ice that is to be subject to the spell.