Arcane Lake

Arcane Lake is a Caryll Rune in Bloodborne.

A secret symbol left by Caryll, runesmith of Byrgenwerth.
This transcription of the Great Ones' inhuman voices ripples like a watery reflection.

This rune means "Lake", and those branded by it enjoy augmented defense.
Great volumes of water serve as a bulwark guarding sleep, and an augur of the eldritch Truth.
Overcome this hindrance, and seek what is yours.

Arcane Lake Effect

Increases arcane defence. Stacks additively rather than multiplicatively, giving diminishing returns. 

Variants

 Arcane Lake has 3 variants, found in Yahar'Gul, Byrgenwerth, and Isz, respectively. 

Arcane Lake +1

Increases arcane defence by +5%. Found on a corpse in Yahar'Gul, Unseen Village, behind one of the burning corpses on the left wall leading to the boss arena. 

Arcane Lake +2

Increases arcane defence by +7%. Found on Byrgenwerth to the left of the lamp, near a tree with a brainsucker.

Arcane Lake +3

Increases arcane defence by +10%. Found in the Isz Root Chalice Dungeon.