The Coren Direbrew encounter is a fairly easy boss fight. You can queue for him via the dungeon finder tool upon reaching level 99.
To start the encounter, talk to Direbrew, it is best if you let the tank do this so that they can pickup the boss and his adds immediately.
DPS should focus on Direbrew the entire encounter, do not worry about the adds, they can be tanked throughout the encounter and killed via cleaves and other AOE.
Adds also spawn throughout the encounter via tunnelers that pop out of the ground. These tunnelers will interrupt casting if you're still standing on them when they break through, so move away if the ground starts to come up under your feet.
Throughout the encounter, Isla Direbrew will randomly chuck mugs of beer at players. Make sure to right click them in your inventory to drink them before she throws a second mug to you. If you do not drink the first mug in time, she will stun you for 6 seconds.
After Direbrew is killed, any remaining adds will despawn. For the first kill each day, you will be rewarded a Keg-Shaped Treasure Chest. Direbrew also has a chance to drop one of the following trinkets each time he is killed: Coren Direbrew
This item drops in all three raid difficulties (LFR, Normal, Heroic). It will also drop regardless of whether or not you've already killed the Sha of Fear that week. (Source)
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The Coren Direbrew encounter is a fairly easy boss fight. You can queue for him via the dungeon finder tool upon reaching level 99.
After Direbrew is killed, any remaining adds will despawn. For the first kill each day, you will be rewarded a Keg-Shaped Treasure Chest. Direbrew also has a chance to drop one of the following trinkets each time he is killed: Coren Direbrew
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Fel-Charred Tome is used by high level (>= level 86) characters to unlearn glyphs and talents.
They can be bought from various vendors or made by scribes (aka inscriptionists).
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Jade Guardians can be found throughout the Forest Heart (coords 39/49).
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The cubs are clinging to the trunks of trees throughout the Forest Heart (coords 39/49). Simply talk to them and tell them it is safe.
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Silkwood Stalker can be found throughout The Silkwood, which is south west of Dawn's Blossom (coords 45/47).
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Pristine Silk Strand can be gathered from Silk Patch inside The Silkwood, which is south west of Dawn's Blossom (coords 45/47).
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Fresh Whitepetal Worm are gathered from mounds of Fresh Dirt that can be found around Whitpetal Lake.
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Mogu Artifact can be found scattered around the lake bed of Whitepetal Lake (coords 40/48).
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Stillwater Crocolisk can be found in and around Whitepetal Lake (coords 40/48).
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You must obtain a Chimera of Fear from the Sha of Fear in the Terrace of Endless Spring for the quest Fear Itself.
This item drops in all three raid difficulties (LFR, Normal, Heroic). It will also drop regardless of whether or not you've already killed the Sha of Fear that week. (Source)
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Whitepetal Reeds can be found along the shores of Whitepetal Lake (Coords: 40/48).
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Shao-Tien Surveyor can be found stealthed all around Whitepetal Lake (Coords: 40/48).
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You can find Stunned Whitepetal Carp floating, stunned, atop Whitepetal Lake (Coords: 41/48).
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Knifetooth Swarmer can be found throughout Whitepetal Lake (Coords: 40/48).
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Be mindful not to complete the accompanying quest until you have replaced the staff, as doing so removes the staff from your character.