Dark crystal (reduced healing)

The Dark crystal (reduced healing) is one of the debuff crystals dropped by bosses during Morvran's Slayer challenge. It is not dropped by any specific monster. The crystal reduces the life points healed by an item by dealing 25% damage for every healing action. For example, if a shark (which heals 2,000 life points) is eaten, the crystal will immediately deal 500 damage.

Soul Split is not exempt from the crystal.

When attempting to destroy any dark crystal, the player will not be able to progress in Morvran's Slayer challenge unless they are carrying all dark crystals earned so far while killing the next boss. Destroying the crystal will make the player have to reclaim it from Morvran to continue in the challenge.