Keystone Level 4 - Xal'atath's Bargain

At Mythic Keystone level 4, players will see their first affix,  Xal'atath's Bargain: Ascendant,  Xal'atath's Bargain: Voidbound,  Xal'atath's Bargain: Pulsar or  Xal'atath's Bargain: Devour depending on the week. Here's a short overview of how these affixes work:

•  Xal'atath's Bargain: Ascendant:
  About every minute, Xal'atath will show up and summon a total of 10 Orbs of Ascendance that cast  Cosmic Ascension. If the casts go off, these orbs will buff other mobs with +20% movement speed and Haste per orb/cast. However, if players stop the cast through interrupting, displacing them, crowd controlling them, or purging them, players will receive a 2% movement speed and Haste buff per orb/cast stopped netting players a maximum of +20% movement speed and Haste that lasts 30 seconds.
•  Xal'atath's Bargain: Voidbound:
  While in combat, Xal'atath summons a Void Emissary to empower nearby enemies with  Dark Prayer. For any mob that has this cast on them, it will reduce their damage taken by 10% every 3 seconds. This effect stacks. Upon defeating the Void Emissary, players will net themselves a +30% ability cooldown rate and +20% Versatility buff that lasts 30 seconds.
•  Xal'atath's Bargain: Pulsar:
  While in combat, Xal'atath manifests pulsars that tether and orbit around players for 15 seconds. The goal here is to absorb the  Void Pulsar before the 15 seconds are up. Players that absorb these crystals will gain increased Mastery and Leech for 30 seconds. If the pulsars are not soaked, the mobs will gain a +10% damage buff and 20% damage reduction buff per orb!
•  Xal'atath's Bargain: Devour
  Periodically, Xal'atath will cast a  Devouring Rift that puts a shield debuff on all 5 players that can be removed either by healing done or dispelling using any dispel type. The shield placed on players is NOT a healing absorb shield! Failure to remove the shield will heal mobs for 10% of their health. Removing an absorb shield grants a stack of  Rift Essence which grants players +2% maximum health and +4% Critical Strike that lasts 30 seconds!

Keystone Level 7 - Fortified and Tyrannical

At Keystone Level 7,  Tyrannical or  Fortified become active, alternating each week. These affixes are quite simple,  Tyrannical increases dungeons bosses health by 30% and their damage by 15%. With  Fortified, non-boss enemies have 20% more health and have their damage increased by up to 20%. These two affixes rotate each week; you will never see  Tyrannical or  Fortified for two consecutive weeks in a row at Keystone Level 4.

Keystone Level 10 - Fortified and Tyrannical: Again!

At Keystone Level 10, both  Tyrannical and  Fortified become active at the same time. Whatever affix that is not active starting at Keystone Level 7 will become active at Keystone Level 10. Again, these two affixes rotate weekly, so if  Tyrannical is active one week at Keystone Level 4, the next week it will become active at Keystone Level 10.

Keystone Level 12 - Xal'atath's Bargain Removed: Xal'atath's Guile Introduced

At Keystone Level 12, Xal'atath removes her bargains, and Xal'atah's Bargain is replaced with  Xal'atath's Guile. Previously known as  Challenger's Peril, Guile makes it so that any deaths during a Keystone will subtract 15 seconds from the time remaining.

The War Within Season 2 Mythic+ Seasonal Rewards

With a new Mythic+ Season means new rewards. The next few sections will detail all of the rewards available with The War Within Season 2 Mythic+.

New Seasonal Mythic+ Achievements: Keystone Legend and Resilient Keystone

Two brand new Achievements are coming with The War Within Season 2 Mythic+. The first one, Keystone Legend, involves reaching 3000 Mythic+ Rating.

 The War Within Keystone Legend: Season Two: Attain a Mythic+ Rating of at least 3000 during The War Within Season Two.

Earning this achievement will net players the Enterprising Shreddertank mount. This looks similar to the Crimson Shreddertank, but with a Chrome polish instead of a Crimson one.

The next achievement, Resilient Keystone, involves completing all Mythic+ Dungeons at a certain Keystone Level. The achievement starts at Keystone Level 12 and has a unique achievement for each increasing level.

 The War Within Season 2: Resilient Keystone 12: Complete all Mythic+ dungeons within the time limit at keystone level 12 during The War Within Season Two.

The reward for earning this achievement will make it so that Keystones no longer deplete below the respective Keystone Level of the achievement. For example, if a player earns the Resilient Keystone 12 achievement, their Keystone will never deplete below level 12 for the remainder of the season. This repeats for Keystone Levels 13, 14, and so on. This is especially helpful for players who push the higher Keystone levels and are going after Title achievements for the season.

Returning Seasonal Mythic+ Achievements

Numerous achievements will be returning for The War Within Season 2 Mythic+: