失窃雷霆

Instead of choosing to speak with the renown heart Kestrel at either camp, go directly to Aetherblade Hideout and enter through the secret wall to trigger this achievement. Can be done at the same time as Brotherhood Saboteur or Speakers Saboteur if you enter the Aetherblade Hideout after receiving, but before reading, the mail from the Kestrel Master Spy. Or if you enter before doing the step that follows reading the mail.