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Oni

Large · Giant · CR 7 · Chaotic Evil

Source. Black Flag SRD

16 (chain mail)

134

Ability Scores

Core attributes and their modifiers.

STR

DEX

CON

INT

WIS

CHA

Overview

Category Monsters

Size Large

Type Giant

Alignment Chaotic Evil

XP 2900

Initiative Bonus +3

Movement

Walk 30 ft (9.1 m)

Fly 30 ft (9.1 m)

Swim 15 ft (4.6 m)

Climb 15 ft (4.6 m)

Crawl 15 ft (4.6 m)

Hover Yes

Senses

Darkvision 60 ft (18.3 m)

Passive Perception 14

Saving Throws

Strength +4 Dexterity +3 Constitution +6 Intelligence +2 Wisdom +4 Charisma +6

Languages

Common,Giant

Resistances & Immunities

Damage Immunities

prone

Damage Resistances

Giant Attributes

Traits

Empowered Weapons

The oni's weapon attacks are magical. When the oni hits with any weapon, the weapon deals an extra 3d6 force damage (included in the attack).

Giant Attributes

The oni is resistant to the stunned condition.

Regeneration

The oni regains 10 HP at the start of its turn if it has at least 1 HP.

Actions

Arcane Bolt

+6 to hit, range 60 ft (18.3 m). Hit: 4d6+3 force damage.

Ranged Spell Attack: +6 to hit, range 60 ft., one target. Hit: 17 (4d6+3) force damage.

Claw

+7 to hit, reach 5 ft (1.5 m). Hit: 2d8+4 plus 3d6 force damage.

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8+4) slashing damage plus 10 (3d6) force damage.

Glaive

+7 to hit, reach 10 ft (3 m). Hit: 2d10+4 plus 3d6 force damage.

Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10+4) slashing damage, or 9 (1d10+4) slashing damage in a Medium or smaller form, plus 10 (3d6) force damage.

Multiattack

The oni makes two Claw or Glaive attacks, or it makes three Arcane Bolt attacks. It can replace one attack with a use of Spellcasting.

Spellcasting

The oni casts one of the following spells, requiring no material components and using CHA as the spellcasting ability (spell save DC 14).

At Will: darkness, invisibility (self only)
1/Day Each: charm, gaseous form, sleep

Whirling Glaive

Recharge 5–6

The oni channels its magic into its twirling glaive, creating magical wind in a 30-foot cone. Each creature in the area must make a DC 14 STR save. On a failure, a creature takes 31 (9d6) cold damage and is pushed up to 15 feet away from the oni. On a success, a creature takes half the damage and isn't pushed.

Bonus Actions

Change Shape

The oni magically transforms into a Small or Medium Humanoid, a Large ogre, or back into its true form, which is Giant. Its statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying transforms with it, except for its glaive, which adjusts to fit its new form. If the oni dies, it reverts to its true form, and the glaive reverts to its normal size.

About Oni

Oni is a large giant with a Challenge Rating of 7. It has a chaotic evil alignment.

In combat, this creature maintains an Armor Class of 16 and possesses 134 hit points (derived from None).

Oni has communication capabilities including Common,Giant. This allows it to interact verbally with various creatures and characters.

GM Tips: Using Oni

3 tips available

When using Oni in your D&D 5e campaign, consider these tactical approaches:

Flight Control Strategy: Target flying creatures with spells like 'Hold Person', 'Web', or 'Grease' to ground them. Without flight restriction, they can escape melee range easily. Consider area denial spells below their flight altitude to force them into disadvantageous positions.
Cold Damage Strategy: Cold-based attacks can slow or freeze. Prepare 'Heat Metal' or fire spells as countermeasures. Ice terrain can be used to create difficult terrain for melee characters.
Regeneration Counterplay: This creature regenerates HP each turn! Players must deal enough damage to overcome regeneration. Certain damage types (acid, fire) may suppress regeneration. Plan sustained damage output.

Player Guide: Facing Oni

3 strategies available

When your party encounters this creature, keep these strategies in mind:

Counter Flight Advantage: This creature can fly! Use ranged attacks, reach weapons, or spells like 'Thunderwave' to push it away. Consider 'Gust of Wind' or 'Earthbind' to ground it. Melee characters need fly speed or flight magic to engage.
Cold Damage Protection: This creature deals cold damage! Get cold resistance or use fire spells. Avoid water surfaces - they can freeze and create difficult terrain. 'Heat Metal' can counter cold.
Counter Regeneration: This creature regenerates HP each turn! Deal enough damage to overcome regeneration. Use acid or fire damage if it suppresses regeneration. Plan sustained damage output.

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 7.

Solo Encounter:

A single character of level 10 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 5,600 XP
Hard: 8,400 XP
Deadly: 11,200 XP

Based on D&D 5e Dungeon Master's Guide encounter building guidelines. CR roughly equals party level for medium encounters.

Frequently Asked Questions

What is the challenge rating of Oni?: Oni has a Challenge Rating of 7, making it appropriate for parties of level 7.0.
What type of creature is Oni?: Oni is a Large Giant, which affects how certain spells and abilities interact with it.
What languages does Oni speak?: Oni can communicate in Common,Giant.