What is the intended reward for clearing Book of Mercenaries

[WingedKagout-2653]

From:

22.6.1 Patch Notes

Patch 22.6.1 is a server hotfix going live on Wednesday, March 23. This patch includes Bug Fixes and changes to Battlegrounds. Battlegrounds Changes: Friend of a Friend has been removed from the minion pool. See the Developer Comment for more details as to why. Several heroes are moving up Armor Tiers (more Armor): Lord Barov, Millificent Manastorm, Onyxia, and Tavish Stormpike are now in Armor Tier 2 (2-5 Armor) Bru’kan is now in Armor Tier 3 (3-6 Armor) Greybough, Kael’thas, an…

Disabled the blank “completed all Book of Mercenaries” pop-up; rewards will be added (and awarded retroactively for those who already earned them) in a later patch