RELL SEAS WIKI

[ Blue Leviathan ]

Ocean Boss[UPDATED - 2026-03-14]
Blue Leviathan

Blue Leviathan is a terrifying aquatic boss rumored to be older than the sea itself. Its enormous body can coil around islands, and it is capable of summoning tidal waves with a flick of its tail. AKA: Ancient Sea Serpent.

[LEVEL]5 out of 5· Ocean Boss
[REGION][Not published]
[SPAWN][Not published]
[HP][Not published]
[KNOWLEDGE][Not published]

Phases

:PHASE-1:

Phase 1 mechanics have not been published.

Tail SweepWater Pressure RoarLunge BiteWhirlpool Beam
:PHASE-2:

Phase 2 mechanics have not been published.

ADVERTISEMENT

Attacks

AttackDamageParryDodgeBlockClip
:PHASE-1:
Tail Sweep
540YESNOYES[GIF -]
Water Pressure Roar
680NOYESNO[GIF -]
Lunge Bite
470YESYESNO[GIF -]
:PHASE-1 & 2:
Whirlpool Beam
780YESNOYES[GIF -]

Rewards & drops

Reward valuesNot published yet
Drop tableNo confirmed drops published
[Fight tips]
  • Long-range attacks and mobility are essential when facing this monstrosity.

Frequently asked questions

What is the Blue Leviathan boss in RELL Seas?

Blue Leviathan is a terrifying aquatic boss rumored to be older than the sea itself. Its enormous body can coil around islands, and it is capable of summoning tidal waves with a flick of its tail. AKA: Ancient Sea Serpent.

How hard is the Blue Leviathan boss in RELL Seas?

Blue Leviathan is a Ocean Boss rated ★★★★★ in difficulty. Its full attack list, phases and counters are detailed on this page.

What attacks does Blue Leviathan use?

Blue Leviathan uses attacks such as Tail Sweep, Water Pressure Roar, Lunge Bite, Whirlpool Beam. Each attack on this page is marked with whether it can be parried, dodged, blocked or evaded.

Where do you find Blue Leviathan and what does it drop in RELL Seas?

Blue Leviathan's exact spawn location and drop table have not been confirmed before launch and will be added to this page once revealed.