Last night, we had a new Beta build and many classes received tuning, so we're starting with Death Knights!
Death Knight
Shattering Blade - When Frost Strike damages an enemy with 5 stacks of Razorice it will consume them to deal an additional 100% 125% damage. Festering Strike - Strikes for [ 139.2% of Attack Power ] Physical damage and infects the target with 2-2 Festering Wounds Festering Wound A pustulent lesion that will burst on death or when damaged by Scourge Strike, dealing [ 28.05% 23.85% of Attack Power ] Shadow damage and generating 3 Runic Power. Pillar of Frost - The power of frost increases your Strength by 35% 40% for 12 sec. Rage of the Frozen Champion - Obliterate has a 15% increased chance to trigger Rime and Howling Blast generates 8 6 Runic Power while Rime is active. A Feast of Souls - While you have 2 or more Horsemen aiding you, your Runic Power spending abilities deal 20% 30% increased damage damage.and have a 10% chance to refund a Rune. Hyperpyrexia - Your Runic Power spending abilities have a chance to additionally deal 30% 45% of the damage dealt over 4 sec. Infliction of Sorrow - After Gift of the San'layn ends, your next Scourge Strike consumes the disease to deal 100% of their remaining damage to the target. When Vampiric Strike damages an enemy affected by your Virulent Plague, it extends the duration of the disease by 3 2 sec, and deals 20% 10% of the remaining damage to the enemy Vampiric Strike - Your Death Coil and Death Strike have a 10% chance to make your next Scourge Strike become Vampiric Strike Vampiric Strike heals you for 5% 2% of your maximum health and grants you Essence of the Blood Queen, increasing your Haste by 1.5% 1.0%, up to 7.5% 5.0% for 20 sec. The Long Winter - While Pillar of Frost is active your auto-attack critical strikes increase its duration by 1 2 sec, up to a maximum of 5 6 sec. Enduring Strength - This effect lasts 2 sec longer for each Obliterate and Frostscythe critical strike during Pillar of Frost. When Pillar of Frost expires, your Strength is increased by 15% 20% for 6 sec Runic Attenuation - Auto attacks have a chance to generate 5 3 Runic Power. Shattered Frost - Deals reduced damage beyond 8 targets. When Frost Strike consumes 5 Razorice stacks, it deals 50% 65% of the damage dealt to nearby enemies Epidemic - Increases the duration of Dark Transformation by 1 sec. Normal: Causes each of your Virulent Plagues to flare up, dealing [ 27.58% 23.44% of Attack Power ] Shadow damage to the infected enemy, and an additional [ 11.03% 9.38% of Attack Power ] Shadow damage to all other enemies near them. Eternal Agony : Causes each of your Virulent Plagues to flare up, dealing [ 27.58% 23.44% of Attack Power ] Shadow damage to the infected enemy, and an additional [ 11.03% 9.38% of Attack Power ] Shadow damage to all other enemies near them Clawing Shadows - Deals [ 100.67% 85.57% of Attack Power ] Shadow damage and causes 1 Festering Wound to burst. Smothering Offense - This amount is increased for each stack of Icy Talons you have and it can stack up to 2 additional times. Your auto attack damage is increased by 6% 10%. Icy Death Torrent - Your auto attack critical strikes have a chance to send out a sleet of ice dealing [ 80% 160% of Attack Power ] Frost damage to enemies in front of you. Scourge Strike - An unholy strike that deals [ 68.64% 58.34% of Attack Power ] Physical damage and [ 37.81% 32.14% of Attack Power ] Shadow damage, and causes 1 Festering Wound to burst.

Reddit user Xiantivia came up with some interesting stats about the number of raids and encounters introduced in every WoW expansion up to now!
Raids like Baradin Hold count as a single boss. Vanilla includes LBRS as a raid but with no bosses to avoid inflating the numbers since LBRS was later changed from a raid. Bonus bosses like Ra-Den in Heroic Throne of Thunder are included. Naxxramas is counted only once as a Vanilla raid and is omitted from Wrath of the Lich King. Raid size and difficulty are not considered in the statistics. The score is calculated by days per encounter divided by encounters per raid, providing a comparison across expansions.
Vanilla and The Burning Crusade had a substantial number of raids, with 9 raids and 62 and 52 raid bosses respectively. Since then, the number of raids per expansion has decreased, with 3 raids becoming the new standard, as major .3 expansion patches are no longer released.
The upcoming expansion, The War Within, is expected to follow this trend with no 11.3 patch. However, Blizzard has promised faster expansions, so we can hope that Midnight will arrive sooner rather than later!
Source: Reddit

Grimtusk Fishing Hole, one of the requirements for Taivan (good boi mount), is available on live servers this week.
Players who are working on unlocking Good Boy's Leash probably know the Grimtusk Fishing Hole has not been available since the week of May 1.  Fortunately, you can complete it to get credit towards Taking From Nature this week!

Head to the Fyrakk Assault area in Azure Span (59 34) and complete the Net Worth quest offered by Gruff Fisher.
If you can't see the quest chances are you don't have access to Ice Fishing.
I'm not an avid angler myself, but one player suggests you should have the Secret Fishing Spots first before completing this quest, but those farming Taivan will possibly know.
Ice Fishing (available at Renown 6 with Iskaara Tuskarr) requires you to craft an Iskaaran Ice Axe. You must loot Pickaxe Blade at 19 24 in Azure Span to do that. If you're using TomTom here are the exact coords where you'll find the item:
/way #2024 19 24
Check the Wowhead comments section for more details.

We finally get to see the War Within login screen in its full glory with music in this week's Beta build!
The previously-datamined War Within login screen has been implemented in this week's Beta build along with the music! You can check it out in the video linked below. Special thanks to Athelarius for the video.
What do you think about the new login screen? It's a clear departure from the environments we've used to see for previous expansions. Would you rather see the Hallowfall crystal shifting? Let me know in the comments!

Blizzard will soon temporarily disable the Character Restoration Service in preparation for Warbands and the War Within pre-patch.
For those who would lie to restore a previously deleted char, it is advised that you do so before the pre-patch goes live. 
(Source)
Warbands are on the way to World of Warcraft®: The War Within™! In order to prepare all characters for the transition to the new system, which will occur during the pre-expansion content update, we will temporarily be disabling character restoration. 
For those who would like to restore a previously deleted character, it is advised that you do so before the pre-expansion content update goes live. After the pre-expansion content update goes live, restoration of characters on your World of Warcraft account will be unavailable for a few weeks.
To restore a deleted character, log into World of Warcraft and click the Restore Character button on your character selection screen. Learn more from our support article. Please be aware that any characters newly deleted during the pre-expansion content period will be unable to be restored during this period.
What are Warbands?
The new Warbands system being introduced in The War Within will encompass all of the characters on a player’s Battle.net account as well as the items, collections, and progression they share.
Many aspects of World of Warcraft have been shared across accounts for some time—essentially a Warband. This includes collection of pets, mounts, transmogs, heirlooms, and more. With the release of Warbands, we are significantly expanding what additional aspects of the game have Warband integration. To name just a few changes:
New reputations and Renown tracks will be Warband-wide. A new Warband bank will allow you to easily store and share items between your characters. The ability to collect most item appearances with any character in your Warband, regardless of their ability to equip the gear. Learn more about Warbands in our previously published overview.