Locked chest in Slaughterhouse (spoilers)

[𝐈𝐧𝐬𝐭𝐚𝐠𝐢𝐛]

In the Slaughterhouse in Everlight, after killing the Butcher, I have discovered a chest with the inscription "The virtuous key, the mage master of three." How do you open it?

[Bleak]

I found 2 out of 3 scrolls which seems to be related to this chest, they're named "the mage vision" or something like that... maybe once you find and read all of 3, the chest will open or something will trigger.

[Dezhnyov]

Quick copy pasta from the thread with the same topic on page 2:

Mage’s Note – Vision
Mage’s Note – Perseverance
Mage’s Note – Self-awareness

Found in:
Old Monastery, Creators Guild, Grey Keep Tower

Read all three then open the chest.

[WarMaster GoreHowl]

where is the old monastery as i think thats the one im missing?

[Keaton]

Old Monastery is a side map of Old Haalayash (second time helping the elves with their problem).