Endothermic Furnace

Negative Furnace is a hardmode furnace made out of Ice blocks. It can only smelt Cold Iron Bars. It looks like a furnace made out of ice and with a blue flame inside.

Recipe

 * 40 Ice blocks
 * 40 Snow blocks
 * 3 Frost Cores
 * 3 Adamantite Bars
 * at a crafting bench