Heart crystal

The Heart crystal is a quest item used in the Legends Quest. It's created by killing the three knights Ranalph Devere, Irvig Senay and San Tojalon in the dungeon under Kharazi Jungle to obtain a lump of crystal, a chunk of crystal and a hunk of crystal, which can then be combined to form the heart crystal. Once combined, the crystal must be activated by using it in a special location in the dungeon before it can be used to open a door that accesses deeper parts of the dungeon.

See the Replenishing the Pure Water section of the Legends Quest guide.