Audio Slave
This spell is a part of the Echo Perception spell chain and can be found in the Echo Perception rune stone.
With this spell you attempt to make the target your slave through the power of sound. The target must make an impossible mental balance check. You can give a penalty by spending more soul, 2 soul is 1 penalty. If the target has failed its mental balance checks you make the target your slave. You have complete control over the target for the duration of the battle.