Soothes the target, reducing the range at which it will attack you by 10 yards. Only affects Humanoid targets. Lasts 15 sec.
"Doctor Herbert Halsey once tested this spell side by side with Rumsey Rum. They both had the same effect." - Deacon Markus Hallow[1]
Mind Soothe reduces the aggro radius of a target mob, which means you can tactically avoid pulling certain enemies. This is very useful to skip certain pulls, or to run through certain areas without drawing enemies, and thus comparable to a targeted version of stealth in some situations. Beware that if the mob resists Mind Soothe you will aggro it and enter combat. Using Mind Soothe on players of the enemy faction is an aggressive action and will cause guards of neutral cities to aggro.
The aggro radius of a mob with the same level as a player is about 20 yards, so if using Mind Soothe against the same level mob as the player, you will gain an extra 10 yards to move with.
Beware of casting it on higher level mobs, as they are more likely to resist, which puts you into combat.