Monster ouroboros large

This is a feature of Land of Mist following the defeat of monsters resulting from a HARD Explore. Once the land has been cleared of its defending monsters, there is a normal 24h collect period. At the end of the 24h, the land will either convert to the normal 48h protected mode OR generate the legendary mine monster Ouroboros

You have 168 hours to complete the battle before it flees.

Basic information

Monster Details
Name Type Divine Breakpoint Time to kill 5% Health (Conquest)
Ouroboros Mist Boss 0 ~4,000 168 hours 125,000,000
Target Areas
Target Health Physical Fire Earth Wind Water Note
Ouroboros 2,500,000,000 100 0 0 -50 0
Monster Loot
1 Epic 2 Epics 3 Epics Legendary Gold Medal
1%+ 24,790,000 38,150,000 82,170,000 138,550,000
99%+ 42,680,000 73,840,000 144,070,000 227,450,000 -
Source: Castle Age Monsters Damage/Loot Spreadsheet

Use this text string to post DMG needed in monster chat:

  • 1 Epic 42.7M, 2 Epic 73.9M, 3 Epic 144.1M, Legendary 227.5M

Participants: only guild members may participate in the battle, with the following distribution:

  • 100 people levels 500+
  • 40 people levels 150-499
  • 20 people levels 100-149

This battle uses the Monster Stance and Piercing/Resistance systems.

Additional Information

Stance Combat System

See the Monster Stance page for more info.

You can see your stance in the "General Alliance" tab; it is your main general's level + the levels of its allied generals that share his/her type (aggresive, balanced or defensive).

A) Your stance matches or is higher than the monster's stance:
- Each action gives you Contribution Points: displayed below your damage, they allow you to be eligible for prizes.
- With an aggresive alliance, your actions will raise the "Damage bar", giving a bonus to damage.
- With a defensive alliance, your actions will raise the "Critical bar", increasing chances of getting a critical.
- With a balanced alliance, your actions will lower the "Decay rate", the speed at which previous bonuses vanish (their bars empty)

B) Your stance is lower than the monster's stance:
- You don't get Contribution Points.
- You don't fill any of the bars above (Damage, Critical, Decay)
Ouroboros' stance difficulty rating is 30.

Level Point Range Damage Boost Critical Boost
0 0-250 0% 0%
1 0-500 10% 2%
2 0-1,000 20% 4%
3 0-2,000 30% 6%
MAX 0-9,999,999 50% 8%

Critical boost for Levels 2-MAX not verified.
Decay starts at -5.0 per second, and decreases with successful attacks with a balanced general.

Ultimate Mode:
Get both the damage and critical bars to max level to unlock ultimate attack mode. When ultimate attack mode is activated, players have a limited time to take advantage of vastly increased damage and critical chance before both bars reset to their starting values.
Players have 2 minutes to attack with +100% damage, and +10% critical chance.


Ouroboros has Piercing Resistances, and Wind Weaknesses.

  • Main Body: -50 Wind Resistance (Maximum bonus 5%), +100 Piercing Resistance (Maximum block 10%)*

*Tested with 75 Physical Piercing: 2.5% damage reduction. Meaning that 25 Physical Resistance blocked 2.5% of the damage.

Siege Weapons

While fighting Ouroboros, there are 5 siege weapons that can be launched to deal extra damage.
All Siege Weapons hit Ouroboros and are unaffected by blocks and resistances.
*Ouroboros has 2,500,000,000 HP

Name Clicks Damage Dealt

%HP Dealt*

Valerian Soldiers Valerian Soldiers 10 64,000,000 dmg
6,400,000 dmg/click
2.56 %
0.26 % per click
Elven Rangers Elven Rangers 20 80,000,000 dmg
4,000,000 dmg/click
3.2 %
0.16 % per click
Dwarven Militia Dwarven Militia 30 96,000,000 dmg
3,200,000 dmg/click
3.84 %
0.13 % per click
Archer Allies Archer Allies 40 112,000,000 dmg
2,800,000 dmg/click
4.48 %
0.11 % per click
Gray Wizards Gray Wizards 50 128,000,000 dmg
2,560,000 dmg/click
5.12 %
0.1 % per click
Totals 150 480,000,000 dmg
3,200,000 dmg/click
19.2 %
0.13 % per click

Every weapon needs confirmation.


Rewards while fighting Ouroborus

Attack Essence 108 Attack Essence

Rewards after slaying Ouroborus

Rare Drops Epic Drops Legendary Drops
Shield of Endless Cycles Shield of Endless Cycles Off-Hand: Attack:30 Defense:70
Item Bonus: +25 Earth Pierce, -10 Water Resistance, +50 Physical Pierce

Helm of the Sorcerer-King Helm of the Sorcerer-King Helmet: Attack:100 Defense:90
Item Bonus: 2 Slots, +15 Earth Pierce, -5 Water Resistance, +50 Physical Pierce
Sandworm Gloves Sandworm Gloves Gloves: Attack:60 Defense:40
Item Bonus: 2 Slots, +15 Earth Pierce, -5 Water Resistance, +25 Physical Pierce.
Wormhide Breastplate Wormhide Breastplate Armor: Attack:60 Defense:125
Item Bonus: 1 slots, +25 Earth Pierce,
-10 Water Resistance, +75 Physical Pierce

Mark of Paxadrian Mark of Paxadrian Amulet: Attack:80 Defense:70
Item Bonus: +25 Earth Pierce, -10 Water Resistance
Spirit Ouroboros Spirit of Ouroboros Magic: Attack:55 Defense:55
Item Bonus: +10 Earth Pierce, -5 Water Resistance, +5 Physical Pierce

Green Wurm Skin Green Wurm Skin

Blue Wurm Skin Blue Wurm Skin

Brown Wurm Skin Brown Wurm Skin

Blue Wurm Eye Blue Wurm Eye

Green Wurm Eye Green Wurm Eye

Fang Trident Fang Trident Weapon: Attack:125 Defense:70
Item Bonus: 2 Slots, +50 Physical Pierce, +15 Earth Pierce, -25 Wind Resistance

Loot thresholds for 99%:

  • Rare: 1 > 19,000,000 (starts at 9.5M), 2 - 47,200,000 (starts at 14.2M), 3 - 85,340,000 (starts at 16.1M), 4 - 114,900,000 for 50% (starts at 19.7M)
  • Epic: 1 - 42,680,000 (starts at 24,790,000), 2 - 73,840,000 (starts at 38,150,000), 3 - 144,070,000 (starts at 82,170,000).
    • You must deal the damage above AND at least 14.9M CP (contribution points)
  • Legendary: 1 - 227,450,000 (starts at 138.6M).
    • You must deal the damage above AND at least 98.3M CP (contribution points)


Item Archives

None of this monster's items or alchemies are in the Item Archives.


  • Gold Medal: this monster doesn't have a gold medal award.
  • Slay Ouroboros 5 Times (1,000,000 min dmg + def): +5 Favor Points.


  • Introduced: January 23, 2016, with spawn rate adjusted to increase with guild level on January 28, 2016.
  • Please help the Castle Age community by entering your loot data in THIS spreadsheet.
  • The loot thresholds in this article are also based on Ditendra08's more recent personal spreadsheet which can be found HERE.

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