From wow.incgamers.com

Statistics

Talent Improvements

The talents below affect Howl of Terror in the following ways:

Affliction Tree

Talent: Suppression
Effect: Reduces chance enemies resist Affliction spells.
Statistics: Rank 1 = -2% chance, Rank 2 = -4%, Rank 3 = -6%, Rank 4 = -8%, Rank 5 = - 10%

Talent: Grim Reach
Effect: Increases range of Affliction spells.
Statistics: Rank 1 = 10% increase, Rank 2 = 20%.

Talent: Improved Howl of Terror
Effect: Reduces the casting time of Howl of Terror by:
Statistics: 1 point = 0.8 sec, 2 points 1.5 secs (making Howl of Terror instant cast)

Talent: Improved Drain Soul
Effect: Returns mana if target is killed by you while you drain its soul. Also, Affliction spells generate less threat.
Statistics: 1 point = returns 7% mana & 5% less threat. 2 points = returns 15% mana with 10% less threat.

Talent: Contagion
Effect: Increases the damage of Curse of Agony, Corruption and Seed of Corruption and reduces the chance Affliction spells will be dispelled.
Statistics: 1 point = +1% damage & -6% chance skill is dispelled, 2 points = +2% & -12%, 3 points = +3% & -18%, 4 points = +4% & -24%, 5 points = +5% & -30%

Threat Level

Insert details of the level of threat generated by Howl of Terror.

Uses in PvP

Please feel free to add a bullet list of uses within PvP or editorial if you have more to say. What use is it against other builds, what skills can it be used to counteract or prevent. What skills does it work well in combination with.

Uses in PvE

Please feel free to add a bullet list of uses within PvE or editorial if you have more to say. What skills does it work well in combination with. Which creatures/bosses in particular is it useful against.