Island oni

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Island oni
Water yai
A island oni.

An island oni,1 also known as a water yai,2,34 resembles a towering humanoid with blue skin, small fangs, and a third eye glaring from their forehead, wearing soaking wet robes. These oni claim islands near coasts and hoard riches scavenged from shipwrecks, sometimes enlisting their undead inhabitants in the process.5

They often assume the forms of enormous merfolk in the water, but prefer to adopt the shapes of storm giants when on land. Island oni tend to be easily distracted by beautiful treasures, and despite their evil natures are prone to acts of unexpected frivolity.6

On Golarion

See also: Category:Island oni/Inhabitants


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  1. Logan Bonner, et al. Oni” in Monster Core, 255. Paizo Inc., 2024
  2. Paizo Inc., et al. “Monsters A to Z” in Bestiary 3, 212. Paizo Inc., 2011
  3. The singular and plural forms of "oni" and "yai" are the same.
  4. Paizo referred to types of oni as yai until the Pathfinder Second Edition Remaster Project and publication of Monster Core.
  5. Logan Bonner, et al. Oni” in Monster Core, 254–255. Paizo Inc., 2024
  6. Mike Shel. “Ecology of the Oni” in The Brinewall Legacy, 73. Paizo Inc., 2011
  7. Paizo Inc., et al. “Chapter 1: Fiendish Divinities” in Book of the Damned, 126. Paizo Inc., 2017
  8. Patrick Renie. “Continuing the Campaign” in The Empty Throne, 63. Paizo Inc., 2012