Dragonforge utilises the flaming energy of dragons in your steel. 1 flame gland will make 1 ingot. 

When you kill enough dragons and get some flame glands. put 1 of them with some gold in a granite crucible with some steel (Ratio 1:1:1). This will infuse the elements. After that; it needs further processing, put it back with 3 flux and 1 carbon (Ratio 1:3:1) to properly create an ingot: Dragonforge requires Granite crucible.

Dragonforge is useful for weapons tools and armours. It is superior to steel in all physical ways. in addition: Hitting entities with dragonforge lights them on fire, Dragonforge bows ignite arrows, Dragonforge Knives cook food and dragonforge axes/saws have a chance on dropping charcoal when breaking wood.