Since no one really has a clear lead on the Wyrmheart weapons, I am gonna share my thoughts about where to find these weapons. I have considered 2 possible locations based on my research and the comments on these threads.
Firstly, I think these weapons aren't dropped by mages because the name of the weapon itself has "Wyrn" and the mobs around the 205 room include Hexwyrms. Hexwyrms throw a fireball at you every once in a while and so, I believe these are the mobs you should be going after since the weapon description matches too. Also, I have killed mages in the 4 corners after reading the location mentioned on this post (WHICH, I NOW BELIEVE IS INCORRECT) for 10+ hours and I got nothing. So it's highly likely that either the Hexwyrms will directly drop them or a stronger 5* Hexwyrm will spawn (I believe I saw a 5* either xp or gold Hexwyrm mob in summoning chambers a very long time ago, can't clearly remember). Also, note that the Hexwyrms are called "Ancient Hexwyrm" and as it appears that Ursa braces tend to come from "Ancient" bears, I am guessing most likely a 5* Hexwyrm will spawn.
Secondly, if the "Only divine mobs drop these items" theory is correct, then I am quite sure that these weapons come from the 205 edl adds. They have the word "Wyrmlord" in their name and as regeneration weapons tend to drop from 215 edl adds, it is highly likely that these edl adds will drop weapons too. One disadvantage is that you will need the tower pink potions to survive in that room and farming for 10 hours or so with such a huge disadvantage is quite discouraging. If VR is run by some really mean people or people who love to see you struggle, then be 100% sure that these adds drop the Wyrmheart weapons. LOL .
I will do some further research on the elemental damage braces as well before I share my thoughts about them. If anyone has already found a Wyrmheart weapon, then please let me know if this hypothesis is correct or not lol. Good luck and keep us informed!
Level 225 Warrior