Bug description: According to archive.org that I was kindly linked by Quicksand, the weekly cap should only be at 15 once Tomb unlocks(as in not just 3 bosses)
Proof:https://web.archive.org/web/20170729125859/http://www.wowhead.com/mythic-keystones-and-dungeo ...
Character Name: Roullette
Item Name & ID: Glyph of the Spectral Raptor
Armory Link: https://armory.wow-freakz.com/character/felsong/roullette
Details: (optional) After using it , it does change the spell book description but it stays normal wolf and oth ...
Topic: 
World of Warcraft
