Lock level 1.
Others, Neketaka, Periki's Overlook
Locations on Neketaka, Periki's Overlook
1
Locked Door
2Locked Door to the Vault
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3
Scrying Pool
Related quests: Bekarna's Folly
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Statue
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5The Stone Wall
Examine it, disable alarm system, destroy it.
6
The Ward
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7The Ward
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8The Ward
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9The Ward
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10
Traps
Seven traps on the ground.
11
Vault Lock
Related quests: The Archmage's Vault
To unlock it you need Transculent Crystal (Yellow-Eye Three has it) or you can fix it and you need combination from Tattered Note (can be found in Tattered Note).