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Comment by AlexisJay

Video guide for the Forgotten Experiments on Normal and Heroic: https://youtu.be/JOlPLTChdMg

Comment by Sheene

what was the missing element that was needed for Rionthus to actually graduate experimentation school., he is very close to the drakthyr we have now.

must have taken 181 attempts to improve the infusion process.

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Rionthus <Experiment 328>

This NPC can be found in Aberrus, the Shadowed Crucible .

Encounter Journal

Heroic		Mythic
Deadly		Important
Tank		DPS
Healer		Interruptible
Magic		Curse
Poison		Disease
Enrage

Overview – The forgotten experiments within Neltharion's laboratory each represent a dark stage in the development of the dracthyr. Neldris enters the fray first and assaults the laboratory's intruders with [Rending Charge].
Upon Neldris' defeat, Thadrion bursts from his containment vat, afflicting players with [Unstable Essence] and belching forth [Volatile Spew].
As Rionthus' predecessor is defeated, he escapes his containment vat and begins to devastate the chamber with Neltharion's most potent version of [Deep Breath].

As Neldris reaches 50% remaining health, Thadrion bursts from his containment vat, afflcting players with [Unstable Essence] and erupting with [Volatile Spew].
As Thadrion reaches 50% remaining health, Rionthus escapes his containment vat and begins to devastate the chamber with Neltharion's most potent version of [Deep Breath].
- Tanks –
  [Infused Strikes] inflict increasing Arcane damage.
  Rionthus soars across the room during [Deep Breath].
- Damage Dealers –
  Neldris dashes between marked players with [Rending Charge], affecting anyone in her path.
  [Unstable Essence] creates an explosion upon removal and jumps to a nearby player.
  Rionthus gains a shield that absorbs damage if [Temporal Anomalies] reach him.
- Healers –
  Neldris' [Rending Charge] inflicts heavy bleed damage on several targets.
  [Violent Eruption] inflicts heavy damage to all players.
  [Unstable Essence] creates an explosion upon removal and jumps to a nearby player.
Zealous Creations – Thadrion and Rionthus each break out of their containment vats to join the fray as their predecessor reaches 50% remaining health.
Neldris
- Rending Charge – Neldris charges between several players, inflicting 273695 Physical damage to anyone in her path, knocking them back, and causing them to bleed for 27370 Physical damage every 1 sec. This effect stacks.
- Rending Charge – Neldris charges between several players, inflicting 273695 Physical damage to anyone in her path, knocking them back, and causing them to bleed for 27370 Physical damage every 1 sec. This effect stacks.
  In Mythic difficulty, Rending Charge does not expire.
- Massive Slam – Neldris unleashes a shockwave that inflicts 629499 Physical damage to players in a frontal cone.
- Bellowing Roar – Neldris bellows an arcane roar, inflicting up to 121 Arcane damage. Players farther from Neldris take less damage.
- Infused Strikes – The experiment's melee attacks inflict 8 Arcane damage every 1 sec. This effect stacks.
  
  Touching another player afflicted by Infused Strikes removes all applications and causes an Infused Explosion.
  - Infused Explosion – The energy from Infused Strikes explodes, inflicting 27370 Arcane damage to all players and an additional 34486 Arcane damage every 2 sec for 20 sec. This effect stacks.
Thadrion
- Unstable Essence – Thadrion infuses players with unstable energy, inflicting 3 Arcane damage every 2 sec and growing in intensity over time.
  
  Upon removal, the energy briefly coalesces and then explodes, inflicting 437912 Arcane damage to players within 12 yards and leaving behind an Erratic Remnant.
  
  A lingering trace of energy then jumps to a nearby player and applies Unstable Essence.
- Unstable Essence – Thadrion infuses players with unstable energy, inflicting 3 Arcane damage every 2 sec and growing in intensity over time.
  
  Upon removal, the energy briefly coalesces and then explodes, inflicting 437912 Arcane damage to players within 12 yards and leaving behind an Erratic Remnant.
  
  A lingering trace of energy then jumps to a nearby player and applies Unstable Essence.
  In Heroic difficulty, an Erratic Remnant is formed when Unstable Essence is removed and Unstable Essence persists after Thadrion's demise.
  - Erratic Remnant
    Erratic Burst – The Erratic Remnant periodically erupts with energy, inflicting 82109 Arcane damage to all players.
- Unstable Essence – Thadrion infuses players with unstable energy, inflicting 3 Arcane damage every 2 sec and growing in intensity over time.
  
  Upon removal, the energy briefly coalesces and then explodes, inflicting 437912 Arcane damage to players within 12 yards and leaving behind an Erratic Remnant.
  
  A lingering trace of energy then jumps to a nearby player and applies Unstable Essence.
  - Erratic Remnant
    Erratic Burst – The Erratic Remnant periodically erupts with energy, inflicting 82109 Arcane damage to all players.
- Volatile Spew – Thadrion spews forth arcane globules that inflict 70 Arcane damage to players within 7 yards of the impact locations.
- Violent Eruption – Thadrion erupts with energy, inflicting 98530 Arcane damage to all players every 1 sec for 8 sec.
  
  Erratic Remnants react to the violent energy, inflicting 10 Arcane damage to all players every 1 sec during Violent Eruption.
- Violent Eruption – Thadrion erupts with energy, inflicting 98530 Arcane damage to all players every 1 sec for 8 sec.
  
  Erratic Remnants react to the violent energy, inflicting 10 Arcane damage to all players every 1 sec during Violent Eruption.
  In Heroic difficulty, Erratic Remnants inflict Arcane damage to all players during Violent Eruption.
- Infused Strikes – The experiment's melee attacks inflict 8 Arcane damage every 1 sec. This effect stacks.
  
  Touching another player afflicted by Infused Strikes removes all applications and causes an Infused Explosion.
  - Infused Explosion – The energy from Infused Strikes explodes, inflicting 27370 Arcane damage to all players and an additional 34486 Arcane damage every 2 sec for 20 sec. This effect stacks.
Rionthus
- Deep Breath – Rionthus takes in a deep breath and flies across the laboratory, spewing molten cinders that inflict 50 Volcanic damage every 0.5 sec for 1 sec to players in his path.
- Temporal Anomaly – Rionthus creates a vortex of temporal energy that begins to drift toward him. If the anomaly collides with Rionthus, he gains a shield that absorbs damage equal to 20% of his maximum health.
  If a player collides with the anomaly, it inflicts 25 Arcane damage, applies Temporal Fracture, and is knocked away.
- Temporal Anomaly – Rionthus creates a vortex of temporal energy that begins to drift toward him. If the anomaly collides with Rionthus, he gains a shield that absorbs damage equal to 20% of his maximum health.
  If a player collides with the anomaly, it inflicts 25 Arcane damage, applies Temporal Fracture, and is knocked away.
  In Mythic difficulty, Temporal Anomalies apply Temporal Fracture.
  - Temporal Fracture – Increases damage taken from Temporal Anomaly by 100% for 20 sec. This effect stacks.
- Disintegrate – Rionthus tears into players with blasts of blue magic, inflicting 71161 Spellfrost damage every 1 sec over 3 sec.
  
  The magic lingers, slowing affected players by 30% and causing them to inflict 6 Spellfrost damage every 1 sec to players within 5 yards for 32 sec.
- Infused Strikes – The experiment's melee attacks inflict 8 Arcane damage every 1 sec. This effect stacks.
  
  Touching another player afflicted by Infused Strikes removes all applications and causes an Infused Explosion.
  - Infused Explosion – The energy from Infused Strikes explodes, inflicting 27370 Arcane damage to all players and an additional 34486 Arcane damage every 2 sec for 20 sec. This effect stacks.