I have a soft spot for the amber dragons of D&D, because they’re basically Nidhogg on a smaller scale and weaponize all the sap they eat.
Though I think a wyrmier appearance and some. Why not make them intrinsic shape changers, with magic registerring a mostly limbless form and their “greater dragon form” as equally true?
Personally, I’d make their’ magnetization ability linked to their breath weapon, but that’s just me.
Monsters and Stuff 