Isma's Tear

Function
Allows the Knight to swim in acid without taking damage.

Albeit very useful, Isma's Tear is not necessary to complete the game. Obtaining it allows access to the following things: It is also useful when exploring Fog Canyon and fighting Uumuu.
 * A Hallownest Seal, found on a corpse in Greenpath.
 * The Shape of Unn charm.
 * Access to Fog Canyon through Forgotten Crossroads and acid pool near Leg Eater.
 * Access to Queen's Gardens.

How to Acquire
Located in Isma's Grove in the Royal Waterways. Requires Crystal Heart and beating Dung Defender in order to access this area.

Trivia

 * In the game files, this ability is referred to as "Acid Armour".
 * Dung Defender refers to it as "Isma's Blessing".

Слеза Исмы La larme d’Isma