Oneblock Online

Raids & Bosses

Monster Island raid bosses, how they spawn, and every reward tier.

Raid bosses are huge Monster Island fights shared by everyone nearby. Your rewards depend on your share of the total damage, shown live on the raid bar at the top of the screen with a damage leaderboard at the top right.

5,000 HP

Sand Colossus

50,000 HP

Glacial Titan

100,000 HP

The Frost Wyrm

A Sand Colossus raid with the boss bar and damage leaderboard

On Desert Island with 3+ players fighting the Sand Colossus. Full screen, third person, so the raid boss bar (top centre) and the damage leaderboard (top right) both show.

public/images/oneblockonline/wiki/raids-and-bosses/colossus-raid.png

How raids start

Raid bosses spawn on their island by themselves once enough players are there. Only one of each can be alive at a time.

BossIslandRarityStarts spawning with
Sand ColossusDesertLegendary3 players
Glacial TitanFrozenLegendary3 players
The Frost WyrmFrozen (fixed lair)Mythic6 players
Archdemon / Vampire DragonHalloweenLegendaryAlways (one at a time, alternating)

Raid rules

  • Your reward tier depends on the share of the boss's total damage you dealt.
  • Dying during a raid disqualifies you from its rewards.
  • Each hit on a Legendary or Mythic boss deals at most 10% of its max HP (5% for the Halloween bosses), so big one-shots don't skip the fight.
  • Check /monsters for every boss's ability list and raid tiers.

Tip

Staying alive matters more than raw damage: a death wipes out your rewards entirely. Back off and heal when you're low.

Sand Colossus

The Desert Island boss and the easiest raid. Ten Colossus kills are needed to unlock Frozen Island.

TierDamage shareBonesMoneyXP / Combat Mastery XP
Contributor5%600-900$1,208-1,55327-36
Veteran15%1,125-1,575$2,185-2,84650-68
Elite30%1,200-1,680$2,346-3,03654-72
Champion50%1,710-2,430$3,416-4,45181-108
  • Every tier gets a random Enchant Scroll; better tiers roll rarer scrolls (Champion can roll Legendary).
  • Veteran and up: one resource roll of 2-5 Diamonds, 3-8 Emeralds, 8-16 Iron, 6-12 Gold or 1-2 Netherite Scrap.
  • Elite: 0.25% Netherite Ingot, 0.125% Pharaoh jar or sarcophagus, 0.125% Desert Sword or Greatsword.
  • Champion: 0.5% / 0.25% / 0.25% of the same, plus 0.25% Pharaoh's Blessing scroll.

Glacial Titan

A Frozen Island Legendary with 8 abilities (listed in /monsters). Same tiers as the Colossus, much bigger rewards.

  • Every tier gets a random Enchant Scroll; Champion can roll a Mythic one.
  • Every tier gets a resource roll: 8-16 Diamonds, 16-32 Emeralds, 32-64 Gold, 16-32 Blue Ice or 2-4 Netherite Scrap.
  • Higher tiers add guaranteed stacks: Veteran 16-32 Blue Ice and 32-64 Iron; Elite also Diamonds and Emeralds; Champion also 32-64 Packed Ice.
TierDamage shareBonesMoneyXP / Combat Mastery XPNetherite Ingot
Contributor5%4,500-6,750$10,500-13,500270-360-
Veteran15%9,375-13,125$21,250-27,500563-750-
Elite30%11,250-15,750$25,500-33,000675-9005%
Champion50%19,238-27,338$44,550-58,0501,215-1,62010%

The Frost Wyrm

The hardest fight in the game: a Mythic dragon with 11 abilities and a lair full of guards (Frost Wyrm Shamblers, Knights and Mages). It is the only source of the four ice Mythic enchants.

TierDamage shareBonesMoneyFrost gearMythic scrollNetherite Ingot
Participant1%6,750-10,125$22,050-28,350---
Contributor5%11,250-16,875$36,750-47,25010%3%2%
Veteran10%18,000-27,000$58,800-84,00020%6%5%
Elite20%27,000-40,500$88,200-126,00040%10%8%
Champion30%39,488-57,713$130,410-181,44065%15%15%
Wyrmslayer45%58,500-82,875$191,100-254,800Guaranteed25%25%
  • Frost gear is one of 8 pieces. The Frost Wyrm Mythic scroll is Home Ice Advantage, Slippery Slope, Snow Mercy or Cold Feet at level I.
  • Every tier also gets a random scroll; Wyrmslayer rolls Rare 5%, Epic 20%, Legendary 45%, Mythic 30%.

The Frost Wyrm in its lair with players fighting

In the Frost Wyrm lair on Frozen Island with 6+ players, third person, the Wyrm mid-attack and its guards visible. Raid bar and leaderboard on screen.

public/images/oneblockonline/wiki/raids-and-bosses/frost-wyrm.png

Halloween bosses: Archdemon and Vampire Dragon

During Halloween two bosses take turns on the Halloween Island raid point: Archdemon, then Vampire Dragon, then Archdemon again. The next one appears 60 seconds after the last dies.

Archdemon

  • Claws, fire geysers and waves of Imps. Orange ground marks warn of an attack; red marks show where it lands.
  • Slam: it lands where you stood when it jumped. Move away, then jump the shockwave.
  • Geysers leave a safe corridor ahead; solid cover blocks them. Stay out of fire rings.
  • Grabs: hit the boss while it holds someone to break the hold and stagger it.
  • At half health it draws a sword during a short protected phase, then summons Armored Imps instead of Imps.

Vampire Dragon → Vampire Lord

  • One shared health pool. It starts as a flying dragon: sidestep bolts and breath lanes, dodge the straight dive, and for Sonic Boom stand inside or outside the ring or jump the pulse.
  • Lower down it lands and fights as the Vampire Lord: melee combos, spells and a lifesteal channel. Hit it during the channel to interrupt the drain.
  • Leave the frontal finisher area before it grabs. It teleports in a bat swarm.
  • Both stages summon Bloodfang Thralls and Crimson Guards (up to 6, replaced every 12 seconds, gone after 30).

Halloween boss rewards

One tier: deal at least 20% of the boss's damage.

RewardArchdemonVampire Dragon
Money$2,346-3,036$2,346-3,036
Bones1,200-1,6801,200-1,680
Resources (one roll)2-5 Diamonds, 3-8 Emeralds, 8-16 Iron, 6-12 Gold or 1-2 Netherite ScrapSame
Flesh Eater armor (2%)Chestplate or LeggingsHelmet or Boots
Halloween Shroud Scythe0.5%0.5%
CandyTop damage dealer only: 25% chanceSame

A full Flesh Eater set needs both bosses; its set bonus is on Armor Sets & Weapons. The Shroud Scythe comes with Death's Reach I: every fourth monster hit sweeps foes ahead for +35% damage and heals half a heart per foe (up to 1 heart per slash).

Archdemon in its sword phase with ground telegraphs and Armored Imps

On Halloween Island at the raid point, fight the Archdemon below half health so its sword is drawn. Third person, with orange/red ground marks and Armored Imps visible, raid bar on screen.

public/images/oneblockonline/wiki/raids-and-bosses/archdemon.png

The Vampire Lord channelling lifesteal

Fight the Vampire Dragon until it lands as the Vampire Lord. Capture it mid lifesteal channel with Bloodfang Thralls nearby, raid bar on screen.

public/images/oneblockonline/wiki/raids-and-bosses/vampire-lord.png