Sure thing. First cut the steel to a tight, heat‑sealed shell that holds the crystal and a reservoir of that enchanted stuff. Seal it so the crystal can draw the fuel out by capillary action. Then bolt on a simple wick system that feeds the crystal whenever it starts to dim. Keep the whole thing in a single, sturdy unit – no fiddly parts, just press‑fit, screw, seal. That way you get a lantern that never burns out unless you run out of crystal, and you can swap it out in a snap. Works, or it doesn't.