•  Overview
Immerseus begins with 100 Corruption, displayed as a visible power bar, and the objective of the encounter is to cleanse him by reducing his Corruption level to 0. Each time Immerseus is reduced to zero health, he Splits into a mix of dark Sha Puddles and watery Contaminated Puddles. Following each Split, Immerseus reforms with reduced health and Corruption depending on how successful the raid was in dealing with the two types of Puddles. This cycle repeats until Immerseus's Corruption reaches 10 or lower, at which point he is cleansed. |
| | •  Damage Dealers - Rotate away from Immerseus's  Swirl ability. When Immerseus splits, destroy the dark Sha Puddles before they reach the center and merge into Immerseus. |
| | •  Healers - Rotate away from Immerseus's Swirl ability. When Immerseus splits, heal Contaminated Puddles to purify them before they reach the center and merge with Immerseus. When Sha or Contaminated Puddles reach the central pool, each one triggers  Erupting Sha, damaging the entire raid. |
| | •  Tanks - Point Immerseus away from the raid, and take turns tanking to mitigate the effects of  Corrosive Blast. When Immerseus splits, destroy the dark Sha Puddles before they reach the center and merge into Immerseus. |
Tears of the Vale
As a water elemental, Immerseus attacks players directly. |
| | •  Sha Bolt - Immerseus fires a Sha Bolt at every enemy, inflicting 34 Shadow damage to enemies within 5 yards, and forming a Sha Pool at the targeted location. Sha Pools inflict 170 Shadow damage every second. |
| | •   Swirl - Immerseus causes torrents of Sha-corrupted water to burst from beneath the cracks in the ground. Players that come into contact with the tainted waters will suffer 68 Shadow damage and be knocked away. |
| | • Corrosive Blast - Immerseus inflicts 1250 Shadow damage in a cone aimed at his primary target, increasing Shadow damage taken by 300% for 45 seconds. Stacks. |
| | •  Seeping Sha - Coming into contact with the Seeping Sha that surrounds Immerseus inflicts 227 Shadow damage and knocks players back. |
| | • [NO DIFFICULTY]  Swelling Corruption - Immerseus surges with power, gaining stacks of Swelling Corruption proportional to his current Corruption level. This power lashes out at players who strike Immerseus with single target abilities, coalescing into a Congealed Sha creature as well as inflicting Sha Corruption upon the attacker, which deals at least 5 Shadow damage every 1 sec for 6 seconds, increasing in damage rapidly with each additional stack. |
Split
Upon reaching zero health, Immerseus becomes unstable and bursts into a shower of Sha Puddles and Contaminated Puddles, which will attempt to reform in the pool at the center of the chamber. For each Sha Puddle killed and each Contaminated Puddle healed to full, Immerseus's Corruption is reduced by one. |
| | • Sha Puddle - When destablized, Immerseus forms one Sha Puddle for every four units of Corruption he has. Destroying a Sha Puddle before it merges back into the central pool will remove one unit of Corruption. |
| | | •  Sha Residue - When a Sha Puddle is destroyed, it triggers Sha Residue, applying Sha Residue to enemies within 10 yards and increasing damage dealt to other Sha Puddles by 0%. This effect stacks. |
| | • Contaminated Puddle - When destablized, Immerseus forms one Contaminated Puddle for every four units of Corruption that have previously been removed. Healing a Contaminated Puddle to full health before it merges back into the central pool will cause it to become Purified, and remove one unit of Corruption upon reaching Immerseus. |
| | | •   Congealing - The speed of the Contaminated Puddle wanes as it increases in health. |
| | | •  Purified Residue - Upon reaching full health, a Contaminated Puddle releases Purified Residue, restoring 25% mana to allies within 10 yards and increasing healing done by 75%. This effect stacks. |
| | • Erupting Sha - When any Puddle reaches Immerseus, it triggers an eruption, inflicting 170 Shadow damage to all players for a Sha or Contaminated Puddle, or 68 Frost damage for a Purified Puddle. |
| | • [NO DIFFICULTY]  Sha Pool - The Sha Pool grows over time, inflicting at least 1 Shadow damage over 1 sec to enemies who touch it, stacking and increasing rapidly in damage proportional to the number of stacks. Touching the Sha Pool causes it to shrink, whereas it will expand whenever any Puddle reaches it. |
| | • [NO DIFFICULTY]  Seeping Sha - Coming into contact with the Seeping Sha that surrounds Immerseus inflicts 227 Shadow damage and knocks players back. |
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