Last Valiant World Boss - Miasma Demon Tree (Re-open) Events


【Event】World Boss - Miasma Demon Tree

【Period】2022/09/07 (Wed) After Maintenance - 2022/09/28 (Wed) 16:00 GMT+8

【Location】Battle>World Boss

【Consumption】World Boss Key. (Gain 1 every 2 hours, with a capacity of 10.)


  • Boss rank will increase every time player defeats Duin

  • Boss difficulty is increased by rank.

  • Rank 21 - 25 available with a higher score when completed. The rewards are the same as rank 20. 


  • Highest Damage in Single Stage

  • Highest Accumulated Damage


  • Ranking Reward

  • Participation Reward


1. Badge of Valor will be reset a week later after World Boss Stage is closed.

2. World Boss Shop will be closed a week later after the World Boss Stage is closed.

【World Boss Shop】World Boss Shop Price Info

【Stage Info】

  • Crypt Keeper Immunities
    • 100% Immune: 
      • Charm
      • Disarm
      • Paralyze
      • Freeze
      • Blind
      • Silence
      • Weaken
      • Attack Reduction
      • Damage Taken Increase
      • Daze
      • Resist Critical Damage Up 50%
  • Its attacks have a high chance to inflict Poison and debuffs to affect skills.
  • It will regularly corrupt monsters to increase their attacks. Poison, Venom, and Septic can help control this effect. Burn or Exploding Burn can help control Posion and debuffs from the Tree.


  • Runewaker Entertainment is not responsible for lost data due to lag, connection issues, or crashes caused by the unstable network.

  • Runewaker Entertainment reserves the right to modify, cancel, terminate, or suspend the Event and its Complimentary content. Please refer to the Official Website for the latest announcement. 

  • The Event can be postponed or canceled due to Force majeure.

  • Matters not mentioned here will follow the regulation of the organizer. 

  • All participants are acknowledged as agreed with the latest announcement on Event Page and Official Website.