Examples of abilities that cause a reduced healing effect to those receiving the healing:
- Mage (20%)
- Priest (20%)
Some other sources of reduced healing effects include:
- Curse of the Deadwood, cast by Deadwood mobs in Felwood.
- Gluth's Mortal Wound
- Watchkeeper Gargolmar's Mortal Wound
There are also debuffs that reduce the effectiveness of healers to heal others.
- Anetheron's Carrion Swarm