Blue Tearstone Ring

In Game Description

The rare gem called tearstone has the
uncanny ability to sense imminent death.

This blue tearstone from Catarina boosts
the defence of its wearer when in danger.

Availability

Treasure from a corpse in Undead Burg, behind the Black Knight - (video)

Use

Boosts defense by 50% when health is under 20%

Notes

It cannot be used to survive attacks that would've otherwise killed you, as the effect does not apply to the damage taken that trigger the ring's buff. The defensive buff only occurs after the ring has already been activated.