Here's a little concept I've been playing with. Possibly after I've done a sufficient amount of the Darkwing Duckette main fic, I may do a spinoff story called Macawber, which would follow Allen Mallard-Macawber, my OC son of DW and Morgana, as he travels around the US and possibly a few other countries fighting against Monsters, Ghosts, and other Sorcerers. Among the story concepts for this spinoff would be an arc or plot thread that revealed the Macawber Family having Demonic Heritage in their Bloodline. This demon blood can manifest in different ways but for Allen, his heritage apart from his magical skill remained dormant until a point in the Macawber story. This pic signifies the possible struggle he would have dealing with with demonic. I simply went with a very devil-like form with horns, fangs, and spiky spines sprouting from his arm. I don't know when it will manifest, so you'll just have wait and see.

Darkwing Duck and Associated characters©Tad Stones and Disney
Allen Mallard and Pic©Me