Tooltips and dungeon journal reflect ability values for one encounter version. Please refer to "Effect" section on spell pages to see values for all raid sizes and difficulties.

Well of Eternity is only available in Heroic Difficulty.

• Corrupting Touch – Peroth'arn's melee strikes apply Corrupting Touch on his current target, increasing damage taken by 10% for 20 sec. This effect stacks.
• Fel Flames – Peroth'arn calls down a fel fireball on a random player, inflicting 33250 to 36750 Fire damage and leaving behind fire that causes 11875 to 13125 Fire damage every second for 30 sec.
• Fel Decay – Peroth'arn's sickly touch causes a random target to decay from within, instantly inflicting 38000 to 42000 Shadow damage and 8075 to 8925 Shadow damage every second for 10 sec. Any healing done to the afflicted player causes the healer to suffer 100% of the amount healed as Shadow damage.
• Drain Essence – At 60% remaining health, Peroth'arn stuns all enemies and inflicts Shadow damage every second for 4 sec.

The Eyes of Peroth'arn

After Illidan interrupts Drain Essence, Peroth'arn returns to the shadows to ambush the heroes. Peroth'arn unleashes his Eyes of Peroth'arn to search for the players. Players gain the protection of their Shadowcloaks to help them avoid the detection range of the Eyes.If players avoid detection for 40 seconds, Peroth'arn becomes visible and weakened with the Enfeebled effect.If an Eye of Peroth'arn discovers a player, Peroth'arn marks the player with Easy Prey, leaps out of the shadows, and attacks the discovered player.

• Endless Frenzy – At 20% remaining health, Peroth'arn frenzies and increases his damage by 25%.