Astral Heart

Description
Astral Heart is an end-game item, used for crafting high-level gear. It is also used to gain access to the Portal Knight's Sanctuary island as well as completing the quest for the Spectral Pal on said island. It can also be used for the end of the game once given to Landor, The Gatekeeper it will be exchanged for a Gatestone. It will be used to enter the Portal Knight's Sanctuary

Dropped By

 * Hollow King
 * Hollow Prince
 * Shadow Crystal

Crafting Uses

 * Lifebinder Ring

In addition, all highest, class-specific set items need an Astral Heart (and a lower gear item):