You can apply an additional Curse 
Whispers of Doom is a notable passive skill that raises the active curse limit by one.
Whispers of Doom is part of a cluster, located on the north-west side of the tree. The cluster also contains Curse Cast Speed, Curse Duration, and Curse Effect nodes.
- The Whispers of Doom keystone has been changed into a notable.
- The area surrounding the Witch, Shadow and Ranger has been redesigned.
- Introduced to the game. Moved the "Monsters can have one additional curse" ability to the keystone passive.