Read from the World of Warcraft client build files.
Where Wyrm's Shadowflame Crest Fits
Items Numbered Next to Wyrm's Shadowflame Crest
Blizzard numbers items as they are created, so the named items next to ID 204196 (204190 to 204201) were usually added in the same batch as Wyrm's Shadowflame Crest: the same quest line, zone, vendor or reward set.
Obsidian Crest of HonorID 204190 · Trade Goods · item level 62"A testament to your incredible efforts on the battlefield."
Lesser Obsidian Crest of HonorID 204191 · Trade Goods · item level 62"A testament to your notable efforts on the battlefield."