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SERESGENUS EPHEMERALITY Worlds Guide: All Six Worlds in Run Order and How to Travel Between Them

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The six main worlds in SERESGENUS: EPHEMERALITY in the order a run opens them — Verdant Isle, Frost Veil, Aridune, Elder Forest, Vulkaris and The Abyss — and how each world's regional boss Heart and the base portal carry you to the next one.

A run in SERESGENUS: EPHEMERALITY opens its six main worlds one at a time, and you spawn on the first of them, Verdant Isle. Every world after the first unlocks through the same short ritual at your base portal — the quick answer below sums it up. If you are brand new to the game, the beginner guide covers the early game; everything below maps the full world chain.

Quick answer

The six main worlds, in the order a run opens them: Verdant Isle, Frost Veil, Aridune, Elder Forest, Vulkaris, The Abyss. Travel between them runs through the base portal: defeat the current world's regional boss to earn its Heart, hold the Heart out at the portal and hold F so it slots in, then step into the portal.

  • Verdant Heart opens Frost Veil, Frost Heart opens Aridune, Dune Heart opens Elder Forest, Elder Heart opens Vulkaris and Magma Heart opens The Abyss.
  • The portal names its destination on screen, for example 'Step into the portal to travel to Frost Veil'.
  • Defeating Acedia in The Abyss, the sixth world, ends the run with '6 of 6 worlds opened'.

The six main worlds in run order

The official description promises six unique worlds, each with its own enemies, resources, secrets and a powerful boss to defeat. They are not open from the start: a run unlocks them one by one, and a finished run's completion screen confirms '6 of 6 worlds opened'.

Data table

Order
1
World
Verdant Isle
Regional boss
Vatranaon - 'Wakes with the Dawn'
Heart that opens the next world
Verdant Heart → Frost Veil
Order
2
World
Frost Veil
Regional boss
Cryost, Warden of Rime
Heart that opens the next world
Frost Heart → Aridune
Order
3
World
Aridune
Regional boss
Khleorn, The Mobile Castor
Heart that opens the next world
Dune Heart → Elder Forest
Order
4
World
Elder Forest
Regional boss
The Firstborn Wyrm, Eldest of the Elder Forest
Heart that opens the next world
Elder Heart → Vulkaris
Order
5
World
Vulkaris
Regional boss
Vulkaris, The Living Volcano
Heart that opens the next world
Magma Heart → The Abyss
Order
6
World
The Abyss
Regional boss
Acedia
Heart that opens the next world
None - defeating Acedia ends the run

Every world in that table has a named regional boss; for the first five, that boss is the ticket onward — defeating it earns the Heart that activates the next portal, while defeating Acedia in The Abyss ends the run. The fights drop crafting materials on top of the Heart — Vatranaon ('WAKES WITH THE DAWN') yielded Vatranaon Heartplate, Cryost added Elemental Residue to the Frost Heart, Khleorn paired Beast Bone with the Dune Heart, and The Firstborn Wyrm dropped Guardian Heartwood alongside the Elder Heart. The Firstborn Wyrm also starts dormant: the run this chain was traced through awakened it with a Wyrm Seed before the fight. The bosses guide goes through those fights one by one.

The worlds change more than their color palette. Frost Veil, the second stop, is a snow world: penguins and snowman-shaped enemies wander it, snowball-related items appear there, and the snowman enemies grow larger when penguins are killed — so shooting the local penguins has consequences. The enemies list tracks what lives in each world.

Climbing the chain is also how your character gets stronger. Each world holds its own resources to craft better weapons and gear, classes shape how you fight, and a base stores your treasures for the next expedition. The resources guide and the base-building guide pick up those threads.

Voxel-style wooden base house on a grassy island shore in SERESGENUS: EPHEMERALITY, with 'Build your base!' text across the image

How you travel from world to world

World-to-world travel runs through the base portal, a large stone frame lined with diamond-shaped slots. Once the correct Heart has been inserted, the portal names its destination — the screen reads 'Step into the portal to travel to Frost Veil' — and walking into it carries you to the next world. The home portal guide looks at the structure itself, and the hearts guide covers the Heart items.

How the cycle works

  1. Defeat the regional boss

    Earn the current world's Heart

    Each world's named boss up to Vulkaris guards the way onward; beating it earns the Heart for the next portal.

  2. Hold out the Heart at the base portal

    Approach the stone frame

    Stand at the portal holding the Heart - the prompt reads 'Hold out the Verdant Heart at the portal and hold F' on the first transition.

  3. Hold F to insert the Heart

    The portal activates

    The Heart slots into the frame and one of its diamond-shaped slots lights up.

  4. Step into the portal

    Arrive in the next world

    The portal surface becomes a travel surface, the screen shows 'Step into the portal to travel to Frost Veil', and walking in carries you to the next world.

Arriving restarts the loop in the new world: its regional boss drops the next Heart, and the same hold-out-and-hold-F ritual opens the world after it, all the way to Magma Heart opening The Abyss.

The last stop: The Abyss

The Abyss is world six, and it is where the run ends. Its boss, Acedia, is woken at an altar — the game warns 'Wake Acedia at the altar. Once he wakes, nobody leaves', and when he rises, 'the hall is sealed'. In his second phase, glowing pillars labeled BREAK stand around the arena while black sword-rain projectiles fall; one completed run cleared those pillars before attacking the boss body. When Acedia falls, the run closes on the 'THE ISLANDS LET YOU GO' screen — 'Acedia has fallen - 6 of 6 worlds opened' — with a WHO / FATE / LEVEL / KILLS / MASTERY results table summing up the expedition. The Acedia boss fight guide and the how-to-win-a-run guide dig into that finale.

Beyond the six main worlds

Six worlds is the main adventure, not the whole game. The official description points to hidden areas, rare discoveries and secret worlds beyond the main adventure, and treats exploring beyond the obvious path as part of progress — worth remembering while you are off gathering in each world. What has been pieced together about those extra locations lives on the secret worlds and hidden areas pages.

Related Guides

Hearts Guide: What They Do

What Hearts are, where boss Hearts come from and how to use them at the portal.

Home Portal: Set a Heart and Travel

Where the home portal stands, how to set a Heart and travel between base and worlds.

Bosses Guide: Regional Bosses by World

Every regional boss by world, where each fight happens and what beating it unlocks next.

Secret Worlds: Do They Exist

Whether secret worlds really exist in the game and what players have actually confirmed so far.