Internal Forge

You are an extremely rare construct, for unknown reasons you contain an internal flame core. The fire is magical in nature, and you may reveal your core flame as you wish and/or at your own peril. The visibility of your flame when not revealed is based on the type of construct you are. Work worth your DM to determine the details of your core.

While revealed, your flame is hot enough to Smith standard metals, adding powerful fuel may allow you to Smith stronger materials.

Additionally three times per day you may use part of your core's flame to cast burning hands, this resets after a long rest. You may also cast continual flame at will. These spells may be cast without material components.