Quote Originally Posted by Debatra View Post
(What kind of longspear is metal enough for this damage to work is beyond me... unless it meant metal objects and any weapons regardless of metal?).
One made by salamanders. Salamanders have the same trait and are in the MM called out as making their spears completely from metal. Makes sense either way. I mean, where are you going to find wood for normal spears on the Elemental Plane of Fire?