The route to the vault required more than a map. Keys, a medallion and expertise were distributed among people who could not simply be asked. A jailbreak expanded the crew, while the train to Prosperity became a moving contest over an Outcaster able to interpret ancient devices.
Each success advertised the group’s presence. Disguises failed against trained perception, private grudges disrupted timing and Akul’s influence narrowed the available roads. By the time Oko reached Tarnation, stealth had become preparation for a confrontation everyone knew was coming. Annie's unusual sight could read enchanted traps and see through false appearances even when a disguise was convincing to her companions. She carried that advantage into the heist, but it did not remove her obligation to protect the younger Kellan.
Kellan’s power changed under pressure. His golden bindings and fae influence grew strong enough to affect Akul, but strength did not tell him when to use it. Annie’s protection and the crew’s survival mattered more to him than proving he could finish a monster alone. In their first confrontation at Tarnation, Kellan momentarily put Akul into a trance but lost control when he hesitated to kill the dragon. Annie fired her thunder rifle to stop Akul from striking him down. That intervention saved Kellan; it did not defeat Akul or open the vault.