Oni Magus

Large giant (shapechanger), lawful evil

Armor Class 17 (chain mail)
Hit Points 153 (18d10+54)
Speed 30 ft., fly 30 ft.

19 (+4) 12 (+1) 16 (+3) 14 (+2) 12 (+1) 20 (+5)

Saving Throws Cha +8, Con +9, Str +9
Skills Arcana +10, Deception +13, Perception +5
Senses darkvision 60 ft., passive Perception 15
Languages Common, Giant
Challenge 10 (5,900 XP)



  • Multiattack. The oni magus makes two attacks with either two claws or one attack with its greatsword.
  • Claw (Oni Form Only). Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.
  • Greatsword. Melee Weapon Attack: +8 to hit, 10 ft. reach, one target. Hit: 32 (8d6 + 4) slashing damage, or 18 (4d6 + 4) slashing damage in Small or Medium form.
  • Change Shape. The oni magus magically polymorphs into a Small or Medium humanoid, into a Large giant, or back into its true form. Other than its size, its statistics are the same in each form. The only equipment that is transformed is its greatsword, which shrinks so that it can be wielded in humanoid form. If the oni magus dies, it reverts to its true form, and its greatsword reverts to its normal size.


The oni magus, like all oni, is descended from evil spirits come to the Material Plane and clad in living flesh. The majority of oni are giants, though less common are goblinoid, kenku, and reptilian oni. Of course, as shapechangers oni magi can alter their appearance to infiltrate other societies and work their way into positions of leadership and influence. They may take command or serve leaders of their less-intelligent giant kin such as ogres, but some prefer to become lone marauders who hold villages hostage, demanding regular tribute in the form of gold, food, or captives, lest they take more than they ask.

Section 15: Copyright Notice

Asian Monsters (5E) © 2021, Legendary Games; Authors Miguel Colon, Jason Nelson, Andrew Ha, Aurélien Lainé, Dan Dillon, Ismael Alvarez, James-Levi Cooke, Robert J. Grady, Jeff Ibach, Matt Kimmel, and Thurston Hillman

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