Flameater
This jagged mageglass dagger’s handle is sheathed in dimpled bronze rather than wrapped in the usual silk. Held in a fire, the flame’s colors shift to a dark purple, dimming the area as the flames slowly starve.
I was able to verify the seller’s claim of this work’s primary effect myself: the bearer of this dagger can feed flame, magical or mundane, to it and later imbue any dweomer of their own with the stolen flame though the handle heats painfully while they do so. Unfortunately, we discovered during replication that it must not be dropped while in the heated state, lest the wielder be engulfed instead. The participant was healed and recompensed threefold for their suffering, as the Great Treatise requires.