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Eidolon Playtest

@undertow.cards

The award-winning tabletop podcast returns for its next adventure: Eidolon TOOL. PODCAST: podcast.undertow.cards PATREON: patreon.undertow.cards TTRPG: games.undertow.cards PHYSICAL BOOK: physical.undertow.cards DISCORD: discord.undertow.cards

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Latest posts by Eidolon Playtest @undertow.cards

GM Notes are available now!

05.03.2026 22:31 πŸ‘ 0 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

We have a new URL! undertow.cards!

05.03.2026 02:14 πŸ‘ 14 πŸ” 15 πŸ’¬ 0 πŸ“Œ 0
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Design Session #74: Governing Aracana | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

Each Region in the Wake is aligned with one of the major arcana, which define what challenges the Threaded will have to face while exploring that land and what conditions they must satisfy to complete their quest.

So how does any of that actually work?

Design Session #74 available now!

04.03.2026 20:51 πŸ‘ 4 πŸ” 6 πŸ’¬ 0 πŸ“Œ 1
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Eidolon TOOL #1: Children of the Anachronistic Dynasty A beast-woman, a wet wrestler, and a phobonaut join an occult demolition derby to the death, in the hopes of receiving a prize from the reality-warping Lateralus.

A beast-woman, a wet wrestler, and a phobonaut join an occult demolition derby to the death, in the hopes of receiving a prize from the reality-warping Lateralus.

Eidolon TOOL #1 is available now!

02.03.2026 16:00 πŸ‘ 10 πŸ” 14 πŸ’¬ 0 πŸ“Œ 5
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Eidolon Playlist #48: Florence + the Machine | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

Iris, Luke, and Maxie discuss the music of Florence + the Machine, the band that inspired Eidolon + MACHINE!

28.02.2026 22:01 πŸ‘ 6 πŸ” 7 πŸ’¬ 0 πŸ“Œ 2
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Eidolon Media Club: Gundam F91 Iris gathers Molly and Crystal to discuss Mobile Suit Gundam F91, Yoshiuki Tomino's 1991 feature film which follows a new cast of characters decades after the original Gundam saga. Iris' miniseries Eidolon + MACHINE is significantly inspired by Gundam, and F91 offers one of the most condensed visions of what Gundam is!

Iris gathers Molly and Crystal to discuss Mobile Suit Gundam F91, Yoshiuki Tomino's 1991 feature film which follows a new cast of characters decades after the original Gundam saga. Iris' miniseries Eidolon + MACHINE is inspired by Gundam, and F91 offers a condensed vision of what Gundam is!

28.02.2026 14:00 πŸ‘ 10 πŸ” 12 πŸ’¬ 0 πŸ“Œ 1
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Eidolon + MACHINE #6: Heaven is Here | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

Trapped in a bubble of unstable time and space, the Leviathans and their pilots fight through despair to create a new future.

The finale of Eidolon + MACHINE is available now!

23.02.2026 20:35 πŸ‘ 6 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0

The STUNNING CONCLUSION of Eidolon +MACHINE will be available tomorrow morning... OR, as soon as wae get one more paid subscriber over on patreon.com/eidolonplaytest!

22.02.2026 23:20 πŸ‘ 6 πŸ” 6 πŸ’¬ 0 πŸ“Œ 0
cw: trypophobia, gore (kinda)

the cover to eidolon tool. the skinless burning hand of lateralus, no longer bound to the body, is now fully reaching for the macrocosm, a dizzying kaleidoscope of grids and shimmering light. 

the logotype rests below the hand combining eidolon's grotesk sans serif and tool's logo from 10,000 Days (sorry lateralus logo and fear inoculum logo you didn't look as good when locking up)

cw: trypophobia, gore (kinda) the cover to eidolon tool. the skinless burning hand of lateralus, no longer bound to the body, is now fully reaching for the macrocosm, a dizzying kaleidoscope of grids and shimmering light. the logotype rests below the hand combining eidolon's grotesk sans serif and tool's logo from 10,000 Days (sorry lateralus logo and fear inoculum logo you didn't look as good when locking up)

new work for @eidolonplaytest.audioentropy.com:
Eidolon TOOL
digital cover

20.02.2026 18:46 πŸ‘ 74 πŸ” 27 πŸ’¬ 4 πŸ“Œ 0
Video thumbnail

Within the ruins of a once-bustling metropolis, the mysterious "H." hosts a demolition derby to the death! Over four rounds, teams will battle for the right to claim any prize their heart desires from the reality-bending Lateralus.

Eidolon TOOL premieres March 2.

art by @boocanan.bsky.social

20.02.2026 14:04 πŸ‘ 24 πŸ” 17 πŸ’¬ 0 πŸ“Œ 2
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Threadspinner, Draft 0.58 | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

Thought the Phantom Clock was too easy? Good news! THREADSPINNER's Malaise system is way meaner! Check out the latest draft!

16.02.2026 18:28 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Eidolon + MACHINE #5: Big God | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

Atropos and LΓ‘khesis finally reunite with their sister, Clotho. After spending decades in Terran captivity, she has her own ideas about how to end the war once and for all.

Eidolon + MACHINE #5 is available now!

16.02.2026 17:50 πŸ‘ 6 πŸ” 6 πŸ’¬ 0 πŸ“Œ 2
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Design Session #73: "World Tendency" | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

You know what's pretty cool in Eidolon? The Phantom Clock. Threadspinner definitely needs something similar, but what should it look like?

Design Session #73 is available now!

12.02.2026 13:01 πŸ‘ 1 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1

Eidolon + MACHINE #3 is available for free!

09.02.2026 14:19 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Eidolon + MACHINE #4: Heavy In Your Arms The battle of Titan has been won, but at great cost. While Mayve comes to grips with her new existence as a Leviathan, Dax and LΓ‘khesis work together to find a way to bring an end to the war.

The battle of Titan has been won, but at great cost. While Mayve comes to grips with her new existence as a Leviathan, Dax and LΓ‘khesis work together to find a way to bring an end to the war.

Eidolon + MACHINE is available now!

09.02.2026 14:00 πŸ‘ 8 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0

Eidolon + MACHINE #2 is available for free!

03.02.2026 19:07 πŸ‘ 1 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

HELLO I AM MORGAn I am a black lesbian artist and such. You can find me podcasting over at @cartoonbuffoons.bsky.social about cartoons and the like and on the Eidolon Adult mini series @eidolonplaytest.audioentropy.com where I play the character Kierra!

02.02.2026 18:53 πŸ‘ 31 πŸ” 31 πŸ’¬ 0 πŸ“Œ 0
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Eidolon + MACHINE #1 GM Notes | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

GM Notes for Eidolon + MACHINE Episodes #1, #2, and #3 are available now!

02.02.2026 17:42 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Eidolon + MACHINE #3: Ship To Wreck | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

The crew of the Ghost Of Winter rush to save Titan's colonists from a sudden attack by the Terran Alliance. Will their compromise survive an encounter with the enemy's Leviathan, or will Mayve's desire for revenge burn Atropos' trust?

Eidolon + MACHINE #3 is available now!

02.02.2026 17:42 πŸ‘ 9 πŸ” 6 πŸ’¬ 0 πŸ“Œ 2
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Get more from EIDOLON: Become Your Best Self on Patreon creating tabletop RPGs and actual-play podcasts!

If we get 1 more member of the Patreon, we will release Eidolon + MACHINE #3 tonight!

01.02.2026 23:03 πŸ‘ 4 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0

All the changes in this Design Session are reflected in the new Threadspinner draft!

31.01.2026 14:18 πŸ‘ 1 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

All the changes in this Design Session are reflected in the new Threadspinner draft!

31.01.2026 14:18 πŸ‘ 1 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
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Design Session #72: Our Starting Lineup | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

NOTHING STOPS THE YEAR OF THREADSPINNER... but winter storms did manage to delay it for a couple days! But now we're back, and ready to wrap up the initial work on the remaining Patterns to get the first draft of Threadspinner ready to playtest!

Design Session #72 available now!

31.01.2026 13:11 πŸ‘ 6 πŸ” 6 πŸ’¬ 1 πŸ“Œ 2
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Eidolon + MACHINE #2: Drumming Song | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

The crew of the Ghost of Winter plans their next moves now that they have awoken the Leviathans Atropos and LΓ‘khesis, while their pilots try to navigate their new relationships to the machines.

Eidolon + MACHINE #2 is available now!

27.01.2026 13:50 πŸ‘ 5 πŸ” 7 πŸ’¬ 0 πŸ“Œ 1
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Eidolon + MACHINE #1: No Light, No Light β€” Audio Entropy In an secret, underground base on Pluto, two Outer Sphere pilots--Dax Burnside and Mayve "Mayday" Dayson--attempt to revive the slumbering war machines known as Leviathans. However, the Terran…

Two Outer Sphere pilots attempt to revive the slumbering war machines known as Leviathans. Faced with a threat from which they can no longer hide, the pair are forced to convince their mecha to fight before the last hope of resistance is entirely snuffed out.

Eidolon + MACHINE #1 is available now!

26.01.2026 14:00 πŸ‘ 4 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0

Eidolon + MACHINE #1 is now available to everyone for free!

26.01.2026 14:07 πŸ‘ 1 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

This week's episode is delayed til tomorrow! Very sorry folks, see ya soon!

26.01.2026 10:43 πŸ‘ 2 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

This week's episode is delayed til tomorrow! Very sorry folks, see ya soon!

26.01.2026 10:43 πŸ‘ 2 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
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Eidolon Playlist #47: Adult Contemporary | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

Crystal, Maxie, Morgan, and Ty get together to talk about the songs referenced in Eidolon ADULT! Learn about the awfulness of John Mayer, the amazing voice of Macy Gray, and the merits and demerits of music that is compatible with shopping!

Eidolon Playlist #47 is available now!

24.01.2026 22:37 πŸ‘ 12 πŸ” 13 πŸ’¬ 0 πŸ“Œ 3
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Eidolon Playlist #47: Adult Contemporary | EIDOLON: Become Your Best Self Get more from EIDOLON: Become Your Best Self on Patreon

Crystal, Maxie, Morgan, and Ty get together to talk about the songs referenced in Eidolon ADULT! Learn about the awfulness of John Mayer, the amazing voice of Macy Gray, and the merits and demerits of music that is compatible with shopping!

Eidolon Playlist #47 is available now!

24.01.2026 22:37 πŸ‘ 12 πŸ” 13 πŸ’¬ 0 πŸ“Œ 3