Unlock Location:
- Progress through the story until reaching "Her Flaming Vision" a Main Quest in Carcadia Burn.
- You will encounter Queen Callis, a major campaign boss.
Farm Method:
- Defeat Queen Callis and finish the main story mission.
- After completing the story mission, return to his arena.
- Use the Encore Machine nearby to reset the fight.
- Repeatedly defeat Queen Callis until
Queen's Rest drops.