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The Deep
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The Deep

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As part of our May D&D sale, this digital title has been marked down by up to 40%. To unearth more savings, visit our May D&D Sale page.

Revisit the works of Mystic Eye Games with Samurai Sheepdog as we bring back popular source books from the past like The Deep!

  • Want rules for any aquatic campaign, full of adventure, highly detailed locations, and stats for many different creatures found therein? This product offers 256 pages doing exactly that! Even better, most of the information is still just as useful with some modification in any d20 system.
  • Want to fill out your collection of Mystic Eye options? Look no further. The Deep is only one of many books returning to PDF; unchanged beyond updating our logos and website.
  • Want to see one of these great books updated for Pathfinder 1st or 2nd Edition D&D? Let us know and we'll put our attention on the most popular first.

About the Book

The Earh Reveals All to the Sky... The land stretches above the shadowed veil of the sea, exposed to the air and sky. Though caves may reach far beneath the land's sun-flooded surface, none of these dry-earth depths can wrap around you, gripping so tight that your very chest cannot rise and fall to breathe.

...While the Sea Keeps Her Secrets. Beneath the waves, creatures monstrous and unfamiliar swim all around you in primal hunger, and they're all looking straight at you. Everything that swims here is food for something, and while this may be as true on land as in the sea, the sea is much more obvious in her hunger. In the sea, your focus is reduced to two critical questions: Will you feed? Or will you feed something else?

The Deep is a 256 page aquatic campaign guide and sourcebook offering comprehensive rules for underwater adventuring. This resource provides you with all the material you need to start an aquatic adventure today.

The Deep offers new underwater locales, places of interest, NPCs, and adventure hooks designed to let your characters jump right in and start playing, including:

  • Syrenae Reef: A vast, tropical city shaped frmo an extensive, magical coral reef.
  • The Soul-Tempering Baths of Nethelat: Hydrothermal vents where living items of surpassing power are created.
  • Krakensgaard: A sea-elven city built in the side of a seamount, guarding a terrible secret.
  • Udral'Nak: A deepwater brine lake thousands of feed below the surface that spawns fearsome, intelligent undead.
  • The Floating Forest: A vast stretch of kelp forest where otterkin build temporary platform villages amongst the giant holdfasts.
  • The Sunken Ruins of Sem La Vah: The remains of an ancient city, with artifacts of ancient magic buried deep amongst the ruins.

Is your character Ready to take the plunge?

  • Dozens of new feats, items, prestige classes, and spells.
  • New magic systems based on coral and currents.
  • Detailed underwater alchemy rules, including the new item creation method of vent-tempering.
  • Underwater combat and spellcasting rules and tactics.
  • New creatures both fearsome and benign, including the majestic and powerful ceti.
  • New aquatic races-including non-humanoids such as delphines and sharken, and rules for playing these types of characters.
  • An introductory adventure, The Depths of Reason, to get you started!

Take your campaign to the next level by dropping it down below!

 Customers Who Bought this Title also Purchased
Reviews (1)
Discussions (3)
Customer avatar
Davide G November 28, 2021 12:34 am UTC
This is very, very good. So good, in fact, i successfully hunted for a hardcover copy online. And it definitely deserve to be upgraded to Pathfinder or 5e. Easily the best underwater setting of all time.
Customer avatar
Samurai S April 13, 2022 6:07 pm UTC
Thank you so much! We'd love to do this as well. Hopefully we can get it in once we're done with some other stuff.
Customer avatar
Perchet V January 26, 2021 8:08 pm UTC
Can I use this content with Pathfinder?
Customer avatar
Samurai S May 03, 2021 12:00 am UTC
Much of the book's content is fully compatible with Pathfinder 1e in the same way much of D&D 3.5 is. There might be some minor tweaks here and there, but yes, I would say you should be able to use it just fine.
Customer avatar
August 22, 2019 8:23 am UTC
This would be great to have the Pathfinder 1E treatment. Glad you could rescue some of the OGL titles that have disappeared.
Customer avatar
Soluman B August 29, 2019 1:17 am UTC
Seconed, I woupd love to have some more aquatic material
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62.64 MB
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File Last Updated:
August 21, 2019
This title was added to our catalog on August 21, 2019.