Breath of the Forge

You touch a piece of unworked nonmagical metal that is no larger than 4 inches on one side, causing it to become malleable and glow as if heated, although it produces no heat. The metal retains its new shape when the spell ends.

The size of the metal you can effect with this spell increases when you reach certain levels, becoming 6 inches when you reach level 5, 8 inches at 11th level, and 12 inches at 17th level.