Creature Feature (5e): Bwoslodoon

The bwoslodoons drift through the astral sea, often seeming completely oblivious to their surroundings. Many make the mistake of believing they are nearly as mindless as the jellyfish of the Prime Material that they strangely resemble. In reality, they are somewhere in between: with an animal intelligence, and in a land where eating and drinking are unnecessary, they have no needs beyond avoiding predators. Bwoslodoons avoid such dangers and will flee or fight if they feel threatened. They also, although it is no simple task, can be domesticated. Those native to the Astral Plane have learned that bwoslodoons can be trained via, strangely, non-magical gemstones. For one reason or another, bwoslodoons seem to greatly enjoy consuming gems (completely destroying them, with no apparent biological or magical benefit) and therefore, at great cost, can be taught simple commands, not unlike a (large, flying, jellyfishlike) horse or dog. However, they are often killed on sight for this same reason: a single Bwoslodoon can consume thousands of gold worth of gems in seconds, destroying the livelihood of more than one traveler on the Astral Sea. 


Large monstrosity, unaligned

Armor Class 16
Hit Points  32 (5d10+10)
Speed Fly 50 ft.

18 (+4) 16 (+3) 14 (+2) 2 (-4) 9 (-1) 8 (-1)

Saving Throws Strength +6, Constitution +4
Skills Acrobatics +5
Damage Resistances fire
Damage Immunities psychic
Condition Immunities prone
Senses Blindsight 80 ft., passive Perception 9
Challenge 1 (200 XP)

Special Traits

  • Strange Brain. A Bwoslodoon’s brain is not centralized anywhere in their body, instead it is spread in long cords throughout. By extension, their minds, while simple, can be difficult to manipulate. Bwoslodoon’s have advantage on mind-affecting magic and abilities, in addition to their immunity to psychic damage. 
  • Love of Gems. A Bwoslodoon is immediately friendly towards any creature visibly carrying gemstones of approximately 50 gp value or higher. Any check related to training or calming a Bwoslodoon can be made with advantage if the creature making the check allows the Bwoslodoon to consume such a gem (completely destroying it). 
  • Of the Astral Sea. A Bwoslodoon gains one level of Exhaustion per day when outside the Astral Plane. The Bwoslodoon can only lose this Exhaustion by returning to the Astral Plane, where any such Exhaustion is then lost at a rate of one level per 24 hours spent upon the Astral Plane.


  • Long ArmsMelee Weapon Attack: +6 to hit, reach 20 ft., one target. Hit: 7 (1d8 + 3) bludgeoning damage.
  • Alien Hunger. The Bwoslodoon rubs its body against a non-magical gemstone(s) it can “see” within 5 ft, absorbing and immediately destroying up to 2lbs of gemstones in range. If a creature in range is carrying, holding, or wearing gemstones (including those set into jewelry and similar pieces), they must make a DC 15 Dexterity save or those gemstones are destroyed in the same fashion. Due to its blindsight, a gemstone must be completely inaccessible to the Bwoslodoon (such as locked in a chest), for a creature’s gems to be completely safe from this ability. For example, gems in one’s pockets or backpack are usually still affected by this ability. 


Bwoslodoons look much like large jellyfish, with dark silver flesh. They have many long and dangling arms, which swing loose and lazily as they move, although their ability to manipulate these arms is limited. Bwoslodoons are rare on the Astral Plane, often hunted so as to mitigate their threat to unsuspecting travelers’ gemstones. However, those that train Bwoslodoons learn to appreciate their great strength, and often can train the beasts to at least curb their excitement at gems so as not to consume them immediately on sight. When used as mounts and beasts of burden, they are quiet, easily managed once trained, and strong. 

A few enterprising travelers have attempted to take bwoslodoons out of the Astral Plane to mixed effect. While their ability to fly remains when such a thing is done, the creatures seem to slowly starve and dehydrate (or at least undergo a process similar in effects and visual) when not on their home plane. Gemstones do not seem to mitigate this effect either, meaning for one to effectively use a bwoslodoon outside its home plane, they must frequently bring it back to the Astral Plane to rest, where they slowly seem to regain their vigor. The exact nature of this ability is, as of yet, unclear; most creatures native to the astral plane either cannot leave it at all or have some ability to sustain themselves when not on their home plane. The bwoslodoon is an enigma in more ways than one. 

About Quin Callahan

Quin Callahan is a freelance writer and college level English and economics tutor of over four years experience. He has written for a variety of gaming, technology, and economics publications. His favorite animal might be the squid but he is rarely certain.

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