What time is it?
Too many of my followers with Timed Battle and none with both Group Damage and something else listed...
97% chance (finishing up in 90 minutes) covering 5/6 abilities, one racial team boost and a location boost.
Rewards 18 Runes, or 2% of the requirement for the legendary chain (slightly less than the 3 stones which was 2.4%)
This is probably a reference to the quest "The Great Brain Robbery" from RuneScape
Garrison Timer Mobile App
Missions and Followers math for maximising success chance
Warlords of Draenor Garrison Missions Guide
Warlords of Draenor Legendary Ring Guide