Wiki / Guild Raid Boss (Beta)

๐Ÿ‰ Skarth, the Rime Wyrm

A wyrm of the opposite temperament from Ashmaw, grown vast and cold in the flooded vaults beneath the old glacier-forts โ€” it wakes only when disturbed by heat it can't abide.

Raids are opening gradually: more bosses will appear here as they unlock. Numbers on this page are pulled live from the game's own code and change with balance patches, so this page is always current as of whatever's actually deployed right now.

HP

42,000

ATK

3100

DEF

500

Element

โ„๏ธ frost

Requires Combat 60+ to join. Up to 8 raiders per attempt โ€” every raid skill lend below scales with no level cap, so there's no such thing as "maxed out" for a lender, only diminishing returns on roster slots (only 8 fit, and there are 10 skills that do something in this fight).

Stats above are Normal. Practice: 27,300 HP / 2015 ATK (no loot, for learning the fight). Hard: 54,600 HP / 4030 ATK, with raid-wide and over-time damage scaled the same way.

โ„๏ธ Frost resist โ€” the main defense against Blizzard and Frozen

Skarth, the Rime Wyrm requires 90 total frost resist to mitigate most of its frost damage. That total comes from two independent sources that add together โ€” neither one alone is meant to be enough. (Every boss uses one of three elements โ€” fire, frost, or lightning โ€” and Ward/gear resist always check whichever one the current boss actually uses, not fire specifically.)

Real gear resist

Your actual CombatStats resist (fire/frost/lightning, whichever this boss uses) from equipped armor, enchants, and sockets โ€” the same stat the rest of the game uses. This is permanent and doesn't depend on anyone's raid lend.

๐Ÿ’  Ward (Jewelcrafting lend)

A Jewelcrafting lender tops everyone up in every element at once: a flat +12 always (just from having a Jewelcrafting lender at all, even between Ward casts), rising to +36 while Ward is actively up โ€” both scale with the lender's Jewelcrafting level, no cap, and work the same regardless of which boss you're fighting.

Meeting the full 90 requirement doesn't negate frost damage entirely โ€” it only reduces it by 50% (the mitigation cap). Falling short scales the penalty smoothly: the further under 90 total resist you are, the less of that 50% you actually get. Bring real frost-resist gear โ€” Ward alone was never meant to carry the whole requirement.

Ability rotation

A new ability is telegraphed 4s before it resolves, on a fixed 15s cadence โ€” the full 7-ability cycle repeats every 105s.

1.

Frost Clawsingle

Heavy physical hit on one raider (or the tank, if Challenge is active).

2.

Blizzardaoe

Heavy frost damage to the whole raid (the tank takes half). Frost resist from gear plus Ward is the only defence, and Skarth demands 90 of it.

3.

Glacial Carapacebuff

Skarth's hide rimes over โ€” its own DEF spikes for a few seconds.

4.

Frozen Brandcurse

Curses one raider โ€” they receive far less healing for a while.

5.

Frost Clawsingle

Heavy physical hit on one raider (or the tank, if Challenge is active).

6.

Blizzardaoe

Heavy frost damage to the whole raid (the tank takes half). Frost resist from gear plus Ward is the only defence, and Skarth demands 90 of it.

7.

Frostbitepoison

Leaves one raider Frozen โ€” frost damage over time, stacks; frost resist (gear + Ward) reduces it. If it runs out without being cleansed, it jumps once to another raider.

โš”๏ธ Frost Claw โ€” 2ร— per cycle

Heavy single-target hit. Goes to whoever's actively taunting (Challenge) if anyone is โ€” otherwise a random living raider. Mitigated by the target's DEF and by Fortify if active, or dodged entirely if Veil is active and the roll lands in its favor. A Reinforce shield absorbs it in full.

โ„๏ธ Blizzard โ€” 2ร— per cycle

Hits every living raider except whoever's actively tanking Frost Claw. Frost resist is the main lever against it; Fortify cuts it by 12% at level 70 while active, and a Reinforce shield soaks up to 100% of each hit.

โ„๏ธ Frostbite โ€” Frozen

Puts Frozen on one raider for 15s: frost damage every few seconds, stacking if it lands again.Frost resist reduces it and Cleanse removes it. If it runs its full course without being cleansed, it jumps once to another raider. Cleanse helps here but isn't required.

Enrage

There's no hard timer that ends the fight โ€” a wipe always comes from the boss actually overwhelming the raid. But the boss doesn't sit still forever either: starting at 210s into the fight,Frost Claw, Blizzard, and Frozen damage all begin climbing, reaching double strength 60s after that point and continuing to climb with no ceiling the longer the fight drags on. A roster that only ever heals and never brings the boss's HP down will eventually take damage faster than any amount of healing can keep up with โ€” that's the real pressure, not a clock.

Raid lends โ€” one skill, one buff, no cap

Every raider always has a basic Attack. Lending one tradeskill to the raid unlocks exactly one more action for whoever lends it โ€” shown here at level 70 as a reference point, but every one of these keeps scaling higher the more that tradeskill is leveled, with no cap. That level is your effective level โ€” skill-boosting gloves/trinkets count toward it, same as everywhere else in the game. Only 8 raid slots exist, so covering every skill at once is a real roster tradeoff โ€” coordinate with your guild, since a skill two people both lend doesn't stack.

๐ŸŽฏChallengeโ€” Combat (Tank) lend

TANK ROLE

Unlocks Challenge (taunt) ยท +210 self DEF, +525 self max HP, takes 65% less damage from the boss's heavy single-target hit while taunting

โœจMendโ€” Spellcrafting lend

Unlocks Mend โ€” the big instant heal: 42% of the target's max HP (~221 HP on a typical raider, ~441 on a tank). Halved on a cursed target.

๐ŸŒฑRegrowthโ€” Gathering lend

Unlocks Regrowth โ€” heal over time: 77 HP every 3s for 15s (up to 385 HP on one raider). Best cast before damage lands.

๐Ÿ’ Wardโ€” Jewelcrafting lend

+12 flat resist to every element always, +36 while Ward is actively cast โ€” raiders still need real resist gear (matching the boss's element) on top to meet its requirement

๐Ÿ›ก๏ธFortifyโ€” Smithing lend

Unlocks Fortify โ€” +220% raid DEF and 12% less damage from the boss's raid-wide attacks while active

๐ŸงชCleanseโ€” Alchemy lend

Unlocks Cleanse โ€” the cure: removes curses, Burning/Frozen/Shocked stacks and Morwenna's Doom Mark from one raider (the only thing that can), plus a small heal of 25% max HP (~131 HP on a typical raider).

โ›๏ธWar Cryโ€” Mining lend

Unlocks War Cry โ€” +22% raid ATK while active

๐Ÿ’ชReinforceโ€” Construction lend

Unlocks Reinforce โ€” refreshes a +84 shield on every raider, absorbing damage before HP โ€” only wears off when it's actually depleted, not on a timer

๐ŸฉธRendโ€” Woodcutting lend

Unlocks Rend โ€” bleeds the boss for 119/tick over time

๐ŸงตVeilโ€” Tailoring lend

Unlocks Veil โ€” +80% chance to dodge the boss's heavy single-target hit entirely while active

The tank role (Combat lend)

Combat is the one lend that's foundational rather than swappable โ€” same tier as "bring a healer," not part of the interchangeable support pool. Lending Combat:

If the tank goes down, taunt lapses and Frost Claw starts landing on random raiders at full force instead.

Special-skill refresh timing

Fortify, Veil, War Cry, Ward, and Rend all run on the same 28s refresh window โ€” they're refresh-not-stack (recasting early just extends the same window, it doesn't add a second one), and a dedicated lender mostly attacks in between recasts rather than spamming the buff every turn. Reinforce shares that same 28s cooldown as an instant shield burst instead of a timed window โ€” but the shield itself has no timer at all once it's up, it only wears off by actually being depleted. Cleanse has no cooldown of its own; like Mend/Regrowth, how often it fires is gated only by the caster's own action bar.

Loot

Everyone in the winning group (alive or not) rolls this table independently on a win โ€” no master loot, no need/greed, no rolling against each other. Item Find doesn't affect these rolls.

Weekly loot: your first clear of each boss per week on Normal or Hard rolls loot for everyone in the group, alive or not (Normal and Hard share it). After that the boss is marked loot claimed for you until the weekly reset, Monday 00:00 Eastern, the same moment for every player. You can keep raiding it as often as you like for leaderboard times. Practice never drops loot and doesn't use your weekly loot.

Progression: bosses unlock in order (Ashmaw โ†’ Thessaly โ†’ Morwenna โ†’ Grimjaw โ†’ Skarth), and everyone in the group must meet the requirement. Practice and Normal of a boss need the previous boss cleared on Normal (a Hard clear counts too). Hard of any boss needs that same boss cleared on Normal first. Ashmaw's Practice and Normal are always open. A win counts for everyone in the group, alive or not. Practice clears never count.

Glacial Core Sharduncommon ยท 55% per kill

Drops as a pair. Smithing forges it into Raidforged gear (Smithing 77): combat plate with this boss's element resist.

Trade Good

Skarth's Rime Crownrare ยท 20% per kill

Helm. Carved from a single brow-plate. Part of the Skarth's Rime set (Crown + Hauberk + Frostheart).

DEF +70 โ€ข Requires Combat Lv 69 โ€ข XP +20/task โ€ข Frost Resist +22

Skarth's Rime Hauberkrare ยท 18% per kill

Chest. Part of the Skarth's Rime set (Crown + Hauberk + Frostheart).

DEF +98 โ€ข Requires Combat Lv 69 โ€ข XP +22/task โ€ข Frost Resist +26

Skarth's Frostheartepic ยท 9% per kill

Trinket. A shard of still-frozen heartstone in a cracked locket, with +3% Crit Chance. Completes the Skarth's Rime set โ€” the strongest raid set in the game.

ATK +44 โ€ข Requires Lv 69 (any skill) โ€ข XP +50/task โ€ข Frost Resist +22 โ€ข +3% Crit Chance

Hoarfrost Bandepic ยท 8% per kill

Ring. The biggest XP/task of any raid ring, combat ATK and a big 2x Gather chance. Stands alone, not part of the set.

ATK +52 โ€ข Requires Lv 69 (any skill) โ€ข XP +74/task โ€ข +18% 2x gather chance โ€ข Frost Resist +17

Rimeheart Aegislegendary ยท 1.5% per kill

Shield. The hardest raid's rarest prize โ€” real tank stats with the highest XP/task of any shield.

ATK +20 โ€ข DEF +76 โ€ข Requires Combat Lv 69 โ€ข XP +34/task โ€ข Frost Resist +18

Rimebound Torcepic ยท 7% per kill

Amulet. Huge XP/task with real ATK and DEF on top โ€” the hardest raid's jewelry.

ATK +40 โ€ข DEF +30 โ€ข Requires Lv 69 (any skill) โ€ข XP +72/task โ€ข Frost Resist +14

Super Titanium XP Potionuncommon ยท 25% per kill

Consumable, drops as a stack of 24 (matduke 2026-10-14: a single potion felt useless). +48% XP for 1 hour.

+48 XP/task for 1h

Titanium Ring Enchant - Experiencerare ยท 15% per kill

Consumable. A ring enchant that adds XP/task for 72 hours.

Applies +24 XP/task enchant to equipped ring for 3 days

Tier 20 Arcane Cacherare ยท 5% per kill

Sealed with a ward even Skarth/Ashmaw's heat and cold couldn't crack. Open it like any other Arcane Cache.

Open for a chance at gold, gear, and rare loot

Random Gem (Tier 1-20)uncommon ยท 10% per kill

One uncut gem, somewhere between Tier 1 and Tier 20 โ€” same pool a Tier 20 Arcane Cache would roll from.

Trader's Tokenlegendary ยท 2% per kill

The same ultra-rare currency token that occasionally drops from world bosses.

Trade Good

Skarth's Rime set bonus โ€” equip all 3 pieces from this boss's drop table at once for +22 XP/task, +20 ATK, +14 Frost Resist.

Everyone in the group that defeats it on Normal or Hard (alive or not) unlocks the Frost Breaker chat title. It's not a roll and doesn't depend on loot.

Raid nights on Discord

Planned raids are posted in the #raiding channel of the IdleWorlds Discord. Each post names the boss, the league and the start time (Eastern), and opens a sign-up thread: react โœ… if you're in, ๐Ÿค” if you might be. Every planned raid is also a Discord event, so you can mark it Interested and get a reminder when it starts.

Results posted to #raid-results start with [Standard] or [SSF]. SSF bosses have far less HP, so the two leagues' clear times aren't comparable.