Witch Doctor Horrify Makes Them All Run in Fear.

Witch Doctor Horrify is a Defensive skill that unlocks at level 8. It costs 37 mana and has a cooldown of 20 seconds.

Horrify is a standard skill that any aspiring battlefield controller should have.

It causes mobs within a 12 yard radius to run around in Fear, which makes it a great skill for getting out of sticky situations, as well as a good support skill for keeping melee allies from getting swarmed by hordes of enemies.

Witch Doctor Horrify Used in Battle!

It also causes the witch doctor to wear a spectral mask, which adds a nice touch to the quirky personality that players have come to expect of them.

Background thanks to Diablowiki:

The Witch Doctor frightens away any enemies in his immediate vicinity. The spell is cast from the WD; it’s not something you can target at an enemy some distance away, which makes it more useful for personal defense, but useless in most tactical situations.

It shares a skill slot with Summon Zombie Dogs, but choosing Horrify over it should not be a tough decision when aiming for a controller build. Though Zombie Dogs is essentially the bread and butter of summoner builds, pure controllers are most effective in a party and should not be in need of minions. However, Zombie Dogs may trump Horrify if the Witch Doctor is attempting a hybrid summoner and controller build.

Witch Doctor Horrify Runtestones

Skill Runes:

Phobia – unlocks at level 14

It increases the duration of the Fear effect by two seconds, buying the witch doctor and allies a bit more time.

Stalker – unlocks at level 21

Gives the witch doctor an extra 20% movement speed for four seconds, great when expecting sticky situations and the need to flee from them.

Face of Death – unlocks at level 34

Doubles the effect radius of Horrify for dealing with bigger mobs.

Frightening Aspect – unlocks at level 44

Gives the witch doctor an additional 100% armor for eight seconds, good when expecting desperate situations and escape is not possible without literally fighting a way out.

Ruthless Terror – unlocks at level 56

Gives 27 mana for every enemy that gets horrified, excellent end-game power-tripping skill where the witch doctor does not run out of mana.

http://us.battle.net/d3/en/class/witch-doctor/active/horrify

http://www.diablowiki.net/Horrify