Did blizz get rid of this glyph? Ive been searching our AH for a few days now and no one ever has it for sale...
1) Buy the mats 2) In trade chat: "LF Combine - Glyph Seal of Vengeance"
Discovery glyphs==relatively rare, trade's probably your best bet tbh - doubt they'd've removed the inscripting spell for it and left the glyph itself :P Was a pain for me to get too, but that was shortly after hitting 80.