Class
A
Ci'th Stone Location
The Faultwarrens – The Sylphid Path/The Gaian Path/The Salamandrine Path/The Nereid Path
Mark
Attacus
Mark Location
The Faultwarrens – Titan's Throne
Reward
Genji Glove
Secondary Reward
10 Bomb Cores
Unlock Conditions
Complete Mission 45: Emergent Evolution, Complete Mission 46: On Silent Wings, Complete Mission 47: Unfocused Rage, Complete Mission 48: The Abyss Stares Back, Complete Mission 49: Tyrannicide, and Complete Mission 50: Road to Predation
In order to activate this Mission, you need to complete every trial in The Faultwarrens first, including all six "E" Missions. Then, take any route you please through The Faultwarrens one more time (I'd suggest ending up at The Salamandrine Path to fight Flowering Cactuars), and take the now-active extra Cie'th stone to fight Attacus.