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All four hidden key locations

Collect the keys at the start of a run to unlock Sprint, High Jump, and five extra inventory slots. The smoothest route is Emerald → Crimson → Golden → Azure.

Best key order

Emerald gives Sprint, Crimson gives the Jump needed for the remaining elevated keys, then Golden and Azure increase your default ten-book capacity to fifteen. Open each matching chest as soon as you collect its key.

01
UNLOCKS: SPRINT

Emerald Club Key

Key location

On the first floor, clear the huge pile of books from the bench nearest the staircase and scales. The key is hidden underneath the pile.

Matching chest

Second-floor landing, beside the Warrior section.

Route tip: Take this first. Sprint makes every later key and every shelving trip faster.
02
UNLOCKS: HIGH JUMP

Crimson Octagon Key

Key location

Look closely at the University of Celesthall crest mounted on the staircase wall. The red octagonal key is attached to the crest.

Matching chest

Second-floor landing, near the Warrior section closest to the stairs.

Route tip: High Jump is required to reach the two elevated keys that follow.
03
UNLOCKS: CARRY CAPACITY +3

Golden Diamond Key

Key location

Face the wall from the staircase. Jump onto the railing and inspect the bottom of the pot on the right-hand side.

Matching chest

Second-floor landing, near the Archery section closest to the stairs.

Route tip: Stand securely on the railing before looking down into the pot.
04
UNLOCKS: CARRY CAPACITY +2

Azure Star Key

Key location

Go to the rear of the second floor and find the 2O Travels of Otherworld shelves. The key sits on top of the diagonal bookcase to the right.

Matching chest

Second-floor landing, beside the Archery section.

Route tip: Line up your crosshair with the key, then use High Jump to collect it from the shelf top.

Do chest upgrades count as major magic?

No. These four rewards are treated separately from the five major spells. They can be used during an Anti-Magic Master run, and the movement plus inventory upgrades are especially useful when shelving manually.

Key checklist

  • Emerald Club — under the bench pile — Sprint.
  • Crimson Octagon — staircase crest — High Jump.
  • Golden Diamond — inside the staircase pot — Carry +3.
  • Azure Star — top of the 2O bookcase — Carry +2.