Mireu

• May spawn in place of any of the other 3 Domain Invasion Wyrms, at a low probability (<1%).
• The battle has a time limit of 60 minutes, at which point Mireu will despawn.
• Players must obtain an Elvorseal to participate in Domain Invasion.
• Unity Concord leaders announce when a Domain Invasion Wyrm will spawn in 10 minutes. This timer is shortened as more players acquire Elvorseals, to a minimum of 30 seconds.
  • After the usual preliminary vanguard is defeated, when Mireu is going to spawn, instead of the usual dragon announcement, the UC leader will say "??? has appeared" instead of using the dragon name.
• Mireu rewards no items, only 80 or 100 Domain Points depending on current consecutive kill count plus regular daily cap regardless of other bonuses.
• Mireu's offensive and defensive stats are significantly higher than the other Domain Invasion Wyrms and, even at very high levels of physical or magical accuracy, will evade and resist at inordinate rates.
  • Estimated 97% resistance to enfeebling Geomancy.^[1]
  • 50% resistance to all elements except Fire and Light, and has 110 Magic Defense Bonus.^[2]
    • No resistance to Light Elemental attacks. 95% resistance to Fire elemental attacks.
  • As of the March 2020 Version Update, Mireu's evasion was lowered to an estimated 1288.^[3]
• At some points during the battle, Mireu will appear to weaken, announced with a log message corresponding to that weakening, "Mireu is giving in!!". During this period, it will take additional damage from attacks. When the weakness wears off, another log message appears, "Mireu is ready to fight once more".^[4]
  • At 1% health, a final log message, "Mireu refused to give in" appears and Mireu will become immune to damage for a time before succumbing and falling to the ground.^[5][6]
• Upon defeating Mireu members are awarded with Domain Points. Defeating Mireu is a server group effort. Winning the battle awards the server as a whole double Domain Points for that duration weekly period. Losing the battle will drop or maintain Domain Points to the minimum lowest level for that week until the server defeats Mireu upon its reappearance.

• Has undispellable Blaze Spikes. Switches to Dread Spikes during Manafont. Switches to Ice Spikes below 50% health after using Wings of Vengeance.
• Standard Wyrm attacks like Horrid Roar, Absolute Terror, and Hurricane Wing (-160 Accuracy Blindness)
• At 50% health Mireu starts using powered up versions of those abilities:
  • Baleful Roar: Front AOE version of Horrid Roar. Takes all buffs + Enmity reset. Only Food effects and your Elvorseal aren't taken.
  • Imposing Visage: Front AOE version of Absolute Terror.
• Wings of Vengeance: Deals heavy AOE Wind elemental magic damage. Switches Mireu's spike effects to Ice Spikes.
• Hyperthermic Breath: Fire-elemental Breath damage in front of the Wyrm. Inflicts Defense Down and Magic Defense Down to players directly in line of the breath. Standing to the side reduces the damage.
• Chosen Finale: K.O.s all Alter Egos within its area of effect. Can K.O. Players
• Chainspell: Casts Meteor exclusively during this phase. Switches spikes to Dread Spikes
• Spike Flail: Used when the primary enmity target is behind its tail and it has TP. Deals 50~60% of Max HP. Inflicts Terror and Warps out its primary target. Has a reduced detection angle (90 instead of 180 degrees) when determining its target.

All spells are AoE

• Ancient Magic II
• Fire and Ice Elemental -ja spells and Tier IV Fire and Ice Elemental -ga spells
• Comet
• Meteor
• Addle
• Bio III
• Paralyga

In Korean folklore, a Mireu (미르) is a greater, or full dragon. (Wikipedia)

• January 2025: Addressed an issue where Mireu would never transition from its invulnerable state at 1% health.