
The Thunder Serpent
Boss
- Lv 90
- Attacks when you come close
- The Shipwreck Coast
Where it lives
The Shipwreck Coast
It lives in Wreck Bay.
Fight
Health 892,500–7,140,000
The fight (tap to show)
- Mechanic damage
This boss's marks deal a fixed amount set for its level (90), in place of the blow multiples below: a move you could dodge 1,968 damage, a hazard 1,722 damage, its signature failed 2,707 damage, burning ground 591 damage a second. More levels and better gear mean more health, so the same hit takes a smaller part of it. Armour, shields and barriers turn aside at most 20% of it.
- Repair
The Old Harpoon Tower stands wrecked on the beach, a gold hammer over it. Every blow on it, a plain one or a skill's, repairs it by its power: at most 4 points a second from each of you, the bar full at 20 points for each of the crowd (at least 5). Full, it shoots by itself: HARPOONED!, the serpent pinned to the beach 15 s, no dive, every blow on it 40% harder; the tower is spent for 60 s. From 66% a second tower: both full together fire as one, the double harpoon (20 s).
When0 s into the fight, then every 60 s.
TipSome repair, the rest strike. A full tower waits up to 8 s for the other while that one is 75% full or more.
- Dive
It dives under the breakers: out of reach 2.5 s, then up at another stretch of the surf. Not while it is pinned.
When14 s into the fight, then every 22 s.
- Wave
A wave rises on the horizon 5 s ahead, the dunes marked white: then everyone on the sand takes 1,968 damage and is Soaked, and each tower loses 25% of a full bar.
When32 s into the fight, then every 46 s.
TipUp a dune before it breaks.
- Lightning Ring
A tower's metal glows white-yellow 3 s: then lightning 6.3 tiles round it, 1.6 ×.
When18 s into the fight, then every 26 s.
TipRepairers, step back from the tower.
- Serpent Young
1–4 younglings crawl out of the surf (one for every 8 of the crowd) and go for the repairers.
When24 s into the fight, then every 36 s.
TipThe tank takes them off the tower.
- Storm on the Sand
Lightning on the wet sand (within 5 tiles of the surf): flashed first, the thunder 1.2 × and Soaked, under up to one of every 6 of you standing there.
WhenFrom 33% health, every 10 s.
TipKeep up the beach.
- Hard enrage
Its time is up: it goes berserk, its blows 2 × as often and 200 % harder, to the end of the fight.
When15:00 into the fight, whatever its health (its bar counts it down).
TipBring it down before the time runs out.
- Rage
It flushes red and rages: its normal blows come 1.3× as often, and all its blows are 15% harder.
WhenAt 30% of its health; it lasts to the end of the fight.
TipThe last part is the most dangerous: save your strong skills and potions for it, and dodging the marks matters more than ever.
Drops
Chest and signature (tap to show)
Boss Stone (Storm Cape)DropSometimes
Majestic health potionDrop× 1–2Always
Majestic mana potionDrop× 1–2Often
TidecallerSignatureSeldom



The chest's table32 pieces · Seldom
Ancient elderwood bowChestSeldom
Ancient elderwood staffChestSeldom
Ancient elderwood talismanChestSeldom
Diamond-hilted daggerChestSeldom
Diamond-hilted swordChestSeldom
Diamond-stitched robeChestSeldom
Diamond-studded wyvern-hide vestChestSeldom
Elderwood bowChestSeldom
Elderwood staffChestSeldom
Elderwood talismanChestSeldom
Runecloth hoodChestSeldom
Runecloth robeChestSeldom
Runecloth sandalsChestSeldom
Runecloth skirtChestSeldom
Runecloth wrapsChestSeldom
Starmetal bootsChestSeldom
Starmetal breastplateChestSeldom
Starmetal daggerChestSeldom
Starmetal gauntletsChestSeldom
Starmetal greavesChestSeldom
Starmetal helmChestSeldom
Starmetal longswordChestSeldom
Starmetal shieldChestSeldom
Starmetal swordChestSeldom
Starmetal-buckled beltChestSeldom
Wyvern-hide beltChestSeldom
Wyvern-hide bootsChestSeldom
Wyvern-hide breechesChestSeldom
Wyvern-hide glovesChestSeldom
Wyvern-hide hoodChestSeldom
Wyvern-hide quiverChestSeldom
Wyvern-hide vestChestSeldom
Quests
No quest asks for it.