Patch 1.13.7

Chronoboon Displacer

Players who complete Chromie's quests in Andorhal can obtain an ancient artifact of Bronze Dragonflight magic.
Use the [Chronoboon Displacer] to store any world buffs such as [Rallying Cry of the Dragonslayer], [Warchief's Blessing], and [Spirit of Zandalar] for later use.
Click the [Supercharged Chronoboon Displacer] to restore your buffs with their previous remaining durations intact.
You may not benefit from additional world buffs until you have restored any that you currently have stored in the Supercharged Chronoboon Displacer.

Beneficial buff priority system
- Beneficial buffs are now prioritized, similarly to how debuffs have been prioritized.
- This should help prevent situations where limited-duration or low impact buffs such as [Renew], [Rejuvenation], or 6-piece set bonuses would "push off" important buffs such as [Rallying Cry of the Dragonslayer] or [Flask of the Titans] when used on a player that is near the buff limit.
- Mark of the Champion, [Rune of the Dawn], and [Seal of the Dawn]'s benefits are now marked as "passive" auras and will no longer count towards the player buff cap.
Spell batching removed
- The 400ms "spell batch" window has been reduced to 10ms.
- This should cause most player abilities to behave in a more responsive way, with damage and healing applied to targets faster. Certain operations in the game now resolve faster, such as purchasing multiple quantities of items from vendors rapidly.
- Paladin seals will now persist on the Paladin for a very short time after they're replaced by a different seal, so that "seal twisting" remains possible.

There is now no area of the raised platform in Heigan the Unclean's encounter space that is safe from Heigan's mana burn while Heigan himself is on the platform.
Fixed a few areas in the Heigan the Unclean encounter space where Plague Waves could overlap and deal double damage.

Made several fixes and improvements to the combat behavior of guardians summoned from items such as the [Vanquished Tentacle of C'Thun], [Defender of the Timbermaw], and [Arcanite Dragonling] to make them more likely to engage in combat in a wider variety of situations.
[Shadow Oil] and [Frost Oil] can now proc while the player is on the Global Cooldown.
- Developers' note: Shadow Oil is still bound by an internal cooldown however, and this is intended.
Resolved an issue that caused the [Barov Peasant Caller] trinket to only spawn 1 Peasant.
Resolved several issues with the [Eye of the Dead] trinket:
- Spells such as [Chain Heal] and [Prayer of Healing] now only consume a single charge.
- Heal-over-time spells now properly consume a charge when used.

The [Cryptstalker Headpiece] is no longer missing part of the red eye glow effect.
Resolved an issue that caused the [Brimstone Staff] and [Rhok'delar, Longbow of the Ancient Keepers] to not properly animate.
City Guards now once again correctly respond to /salute and /wave emotes.