Oni
Large fiend · CR 7 · 2,900 XP
17 AC · 119 HP
Roll the Oni
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Stat block
- Type
- Large fiend, lawful evil
- Armor Class
- 17
- Hit Points
- 119 (14d10 + 42)
- Speed
- 30 ft., fly 30 ft., hover true
- Challenge
- 7 (2,900 XP), proficiency +3
- Resistances
- cold
- Senses
- darkvision 60 ft., passive perception 14
- Languages
- Common, Giant
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 19 | 11 | 16 | 14 | 12 | 15 |
Oni odds against your Armor Class
Chance to hit, then average damage per attack once misses and critical hits are counted.
| Attack | AC 12 | AC 14 | AC 15 | AC 16 | AC 18 | AC 20 |
|---|---|---|---|---|---|---|
| Claw (+7) | 80% 16.4 dmg | 70% 14.4 dmg | 65% 13.5 dmg | 60% 12.5 dmg | 50% 10.5 dmg | 40% 8.6 dmg |
| Nightmare Ray (+5) | 70% 6.7 dmg | 60% 5.7 dmg | 55% 5.3 dmg | 50% 4.9 dmg | 40% 4 dmg | 30% 3.1 dmg |
Oni hit points
The stat block uses the average, 119. Rolled, 14d10 + 42 lands anywhere from 56 to 182.
| Hit points | Chance |
|---|---|
| 88 or more | >99% |
| 119 or more | 52% |
| 151 or more | <1% |
| 169 or more | <1% |
Traits
Regeneration. The oni regains 10 Hit Points at the start of each of its turns if it has at least 1 Hit Point.
Actions
Multiattack. The oni makes two Claw or Nightmare Ray attacks. It can replace one attack with a use of Spellcasting.
Claw. Melee Attack Roll: +7, reach 10 ft. Hit: 10 () Slashing damage plus 9 () Necrotic damage.
Nightmare Ray. Ranged Attack Roll: +5, range 60 ft. Hit: 9 () Psychic damage, and the target has the Frightened condition until the start of the oni’s next turn.
Shape-Shift. The oni shape-shifts into a Small or Medium Humanoid or a Large Giant, or it returns to its true form. Other than its size, its game statistics are the same in each form. Any equipment it is wearing or carrying isn’t transformed.
Spellcasting. The oni casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 13):
Bonus actions
Invisibility. The oni casts Invisibility on itself, requiring no spell components and using the same spellcasting ability as Spellcasting.
Other CR 7 monsters
Giant Ape 
Shield Guardian 
Stone Giant 
Young Black Dragon 
Young Copper Dragon
This page includes material from the System Reference Document 5.2.1 (“SRD 5.2.1”) by Wizards of the Coast LLC, available at dndbeyond.com/srd. The SRD 5.2.1 is licensed under the Creative Commons Attribution 4.0 International License. The averages, odds and tables are ours.