Unholy was originally touted as the PvP DPS tree. What it appears to do rather well, though, are diseases and minions. If your vision of a Death Knight is close to a Diablo 2 Necromancer type, leading an army of undead minions and spreading plague and exploding corpses across the land, Unholy is probably going to be the tree for you. Of course, your crowd control is probably going to be a little peeved at you with all those DoTs, but that's what AE spells like Death and Decay and Unholy Blight are for, right?

Unholy also seems to include quite a bit of utility, including the ability to resist lots of spells and status effects, and some debilitating debuffs, so it could be called a utility tree of sorts as well. Here's a list of some of the Unholy spells and talents available in the WWI Demo:

Unholy Spells:

Death Gate
Requires level 55
Costs 1 Unholy Rune
10 second cast, 15 minute cooldown
Description: Returns you to Ebon Hold (Note: Since Ebon Hold is not yet implemented, in the demo it returned you to Tirion Fordring).

Death Grip
Requires level 55
Costs 1 Unholy Rune
Instant cast, 35 second cooldown.
30 yard range
Description: Harness the unholy energy that surrounds and binds all matter, drawing the target toward the Death Knight and forcing the enemy to attack the Death Knight for 3 seconds.

Plague Strike
Requires level 55
Costs 1 Blood Rune and 1 Unholy Rune
Instant cast
Melee range
Description: A vicious strike that deals weapon damage plus 37 and plagues the target, dealing 350 shadow damage over 12 seconds.

Raise Dead
Requires level 56
Costs 2 Unholy Runes
Instant cast
30 yard range
Description: Raises a ghoul from a corpse to fight by your side. if the target corpse is not humanoid, Corpse Dust must be supplied to complete the spell.

Death Strike
Requires level 58
Costs 1 Unholy Rune
Description: A deadly attack that deals 60% weapon damage. if the target dies within 6 sec and yields exp or honor, Death Strike heals the Death Knight for 406 damage.

Death and Decay
Requires level 60
Costs 1 Unholy Rune, 1 Blood Rune, 1 Frost Rune.
30 second cooldown
30 yard range
Description: 100 shadow damage modified by Attack Power is inflicted every 2 seconds to all targets in the affected area for 10 seconds. Has a chance to cause affected targets to cower in fear

Degeneration
Requires level 62
Costs 1 Unholy Rune
Description: Instantly attack the target, dealing 60% weapon damage and inflicting a disease dealing 91 damage over 21 seconds. Any existing heal over time spells on the target become corrupted, dramatically increasing the damage done by the disease and removing the healing effect. Stacks up to 3 times.

Unholy Presence
Requires level 70
Description: Imbues the Death Knight with unholy fury, increasing attack speed by 15% and reducing the global cooldown on all Death Knight abilities by 0.5 seconds.

Anti-Magic Shell
Requires level 75
Costs 1 Unholy Rune
20 second cooldown
Description: Surrounds the Death Knight in an anti-magic shell, absorbing 75% of the damage dealt by the next harmful spell. Damage absorbed by anti-magic shell energizes the Death Knight with additional runic power. Lasts 5 seconds.

Army of the Dead
Requires level 80
Costs 2 Unholy Runes
10 minute cooldown
Description: Summons an entire legion of your best ghouls to fight by your side.
Unholy Talents:

Lichborne
Requires 10 talent points
Instant cast, 5 minute cooldown
Description: Draw upon unholy energy to become undead for 30 seconds. While undead, you are immune to charm, fear, and sleep effects, and your horrifying visage causes melee attacks to have an additional 25% chance to miss you (Will of the Forsaken, eat your heart out!).

Corpse Explosion
Requires 20 talent points
Requires Runic Power
Instant cast
20 yard range
Description: Unleashes all available runic power to cause a targeted corpse to explode for 3.6 nature damage per 10 runic power to all enemies within 20 yards.

Improved Corpse Explosion
Requires 25 talent points, Corpse Explosion
Costs up to 2 talent points
Description: Exploded corpses cause 25% additional damage and have a 50% chance per point to cast a disease on enemy targets that deals 36% of the explosion Damage over 9 seconds.

Magic Suppression
Requires 25 talent points.
Costs up to 5 talent points
Description: You take 1% less damage from all magic per talent point. In addition, your anti-magic shell absorbs an additional 5% of spell damage.

Anti-Magic Zone
Requires 30 talent points, 5 points in Magic Suppression
Costs 1 Unholy Rune
Instant cast, 2 minute cooldown
20 yard range
Description: Places a large, static, anti-magic zone which can protect any party members inside it. The anti-magic zone absorbs 75% of the damage dealt by the next harmful spell. absorbs up to 10000 damage. lasts 30 seconds.

Crypt Fever
Requires 35 talent points
Costs up to 5 talent points
Description: Your diseases also cause crypt fever, which reduces an enemies attributes by 1% per talent point. Crypt Fever lasts for 18 seconds and can stack up to 3 times

Ebon Plaguebringer
Requires 40 talent points, 5 points in Crypt Fever
Costs up to 3 points.
Description: Your Crypt Fever morphs into Ebon Plague, which increases vulnerability to magic by 1% per talent point in addition to reducing attributes by 5%. Ebon Plague lasts for 18 seconds and can stack up to 3 times.

Summon Gargoyle
Requires 40 talent points
Requires Runic Power
Instant Cast, 5m cooldown
30 yard range
Description: A gargoyle flies into the area and bombards the target with shadow damage modified by the Death Knight's attack power. Persists for 1 second per 8 runic power up to 1 minute.

Unholy Blight
Requires 50 talent points
Requires Runic Power
Instant Cast, 1 minute cooldown
Description: A creeping swarm of unholy insects surrounds the caster for a 10 yard radius. all enemies caught in the swarm take 34 damage and are plagued with a disease that can stack up to 3 times. persists for 1s per 10 runic power.

Yesterday's announcements brought two big notes that will be affecting Shadow Priests. The Fear Ward change and the fact that Spell Haste will affect the global cooldown.

The Fear Ward change, like I mentioned in my last post, is primarily a convenience change for PvE. Reupping Fear Ward every 3 minutes when you need to keep putting Shadowform back on afterwards is annoying, and a large mana drain over long encounters. However, it wasn't crippling, so not a very big deal. What this will help the most is PvP, especially arenas. Having an arena match last longer than three minutes isn't unlikely, so you will probably want to put Fear Ward back up at some point throughout the match. Being required to drop Shadowform to do it is sort of a pain, considering both the loss of damage and the mitigation Shadowform supplies you with, arguably one of the Shadow Priest's strongest defenses.

The Spell Haste change is what has me a little excited. I'll admit right away, I haven't crunched any numbers. I'm notoriously bad at breaking down raw stats, I usually just eyeball my gear and take a guess. I'm right or pretty close more often than not but don't hate me too much if my guesses here are completely wrong. If you want to see some raw numbers, you can probably check them out over at the ShadowPriest.com forum.

Ever since patch 2.3, a number of players have been having a lot of trouble with their instant abilities, especially in PvP. They're finding they get constant "spell is not ready yet" and "target is out of range" errors whenever they mash their buttons. The main source of this problem has to do with a change to the way your computer communicates to the server what your character is doing. It's not very easy to explain, but I'll do my best here. First, I'll explain how the change affects longer spell casts, and then afterward look at how it affects instants.

Here's how things worked in patch 2.2:

1. I press a button to cast a spell or activate an ability.
2. My computer says, "Hey! Realm server! David wants to cast Frostbolt!"
3. The realm server says "Okay!" 300 milliseconds or so later (this round-trip communication time is your "latency").
4. My computer then starts a 1.5 second global cooldown, and shows me the Frostbolt casting bar.
5. I cannot use any other abilities from the time I press the button to the time my Frostbalt casting finishes, unless I manually cancel the spell (as with a /stopcasting macro), or unless the server tells my computer, "Okay the spell is finished already!" or "Whoops! That spell got interrupted!"
   
6. Either way, without a manual interruption on my part, I'm waiting on the server to tell me the outcome of the first spell before I can tell it to start casting the second.

Here's how things work in patch 2.3:

1. I press a button to cast a spell or activate an ability.
2. My computer says, "Hey! Realm server! David wants to cast Frostbolt!"
3. My computer goes ahead and starts the global cooldown for me, assuming the Frostbolt will succeed.
4. The realm says "Okay!" 300ms later, and the casting bar shows up.
5. Alternately, if there's a problem, then the realm says "No way, silly! David isn't finished casting Fireball yet! Wait a moment to try again, and cancel that global cooldown while you're at it!"
6. Either way, I can send my commands to the server whenever I want, as long as my global cooldown isn't currently active -- and if it gets activated too early, I just have to wait for the server to tell my computer to cancel it before casting another ability.

Sounds fine, right? Before, we had to wait for latency between our computers and the realms in order for any spell to go through, but now we just have to wait if we press a button too early.

Your character can be less effective if you mash buttons in 2.3, according to Altitis. You can also stop using the /stopcasting command in most macros.

In the 2.3 PTR patch notes, "client spell cast requests are now sent to the server even if your player is already casting another spell. This eliminates the need for /stopcasting in macros to compensate for latency."

What this means in English is that outside of global cooldown, your computer will try to send a new cast command to the server when you press a button, no matter what.