Medium Fey, Chaotic Neutral
Armor Class 17 Studded Leather
Hit Points 312 (48d8 + 96)
Speed 40 ft.
STR
13 (+1)
DEX
19 (+4)
CON
14 (+2)
INT
16 (+3)
WIS
15 (+2)
CHA
18 (+4)
Saving Throws CHA +10
Skills Insight +8
Condition Immunities Charmed, Exhaustion, Unconscious
Senses Blindsight out to 120 ft. but is otherwise blind, Passive Perception 12
Languages Understands Sylvan, but cannot speak
Challenge 17 (18,000 XP)
Proficiency Bonus +6
Traits

 Ethereal: The Avatar exists only on the ethereal plane, it can't affect or be affected by anything on the material plane, other than the target of Chaos Surge.

 Tethered: The Avatar must remain within 60 ft. of the target at all times.

Actions

 Multiattack: The Avatar makes three attacks with its Elemental Rapier, or replacing one rapier attack with Wrathful Shreak

 Elemental Rapier: Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) piercing damage, plus 27 (6d8) acid, cold, fire, lightning, or poison damage.

 Wrathful Shreak: The Avatar lets out a piercing cry. Each creature in a 40 ft. cone must make a DC 18 Wisdom saving throw, taking 25 (4d12) psychic damage and being paralyzed until the end of the Avatar's next turn on a fail, are taking half damage on a success.

 Chaos Surge(2/long rest): The Avatar chooses either a boon or bane for their target, but not the effect, this action is always accompanied by disembodied chanting that only the target can hear. These effects last until Chaos Surge is used again, unless specified as ongoing(*).

BOONS(d20)

1-2 Gains 1 uncommon item of choice(*)

3-4 Gains 1d4 random potions(*)

5 Gains +2 to AC

6 The target's mind becomes telepathically linked to an ally's, they can tell the exact location of one another, as well

7-8 Gains 4 levels worth of scrolls(*)

9-10 Gains 2d8 Temp HP

11 Grows natural weapons (Alter Self)

12-13 Gains additional 20 ft. in darkvision

14 Gains the ability to make two petrifying attacks. DC 13 Constitution saving throw, an a fail, the target is restrained. At the end of the target's next turn, it must make another save, on a fail, the target is petrified.

15 Target can walk on water for 10 minutes after saying a command word, this works 1d4 times

16 The target's tongue becomes sleek and forked, they gain blindsight out to 10 ft., as long as they continuously flick their tongue

17 Gain 1 9th level spell scroll of the DM's choosing(*)

18 1 of the target's magic items becomes sentient(*)

19 Gains an animal companion of CR 1 or lower(*)

20 Gains a random language


BANES(d20)

1 A nonharmful Symbol effect is cast at the target every 2d6 minutes

2 Target takes on the appearance of a hybrid formed lycanthrope, but otherwise is unchanged

3 Target grows donkey ears and a tail, every time they take an action in combat, roll a d20, on a 1, they immediately fail their action, instead loudly braying for their whole turn

4 Target sheds dim blue light out to 10 ft., and has disadvantage on stealth

5 Gains vulnerability to a damage type

6 Target grows (Enlarge/Reduce)

7 Target shrinks (Enlarge/Reduce)

8 The target swaps minds with another person

9 Gains blindsight out to 60 ft., but is otherwise blinded

10 Target is polymorphed, though they maintain their mental stats

11 1 magic item loses its magic effects

12 A Contagion sweeps through the target, DC 16 to resist, see Contagion spell

13-14 Target forgets a random language, Remove Curse must be cast to remember it(*)

15-16 Target will transform into a CR 6 or lower monster at a random point, Avatar chooses the timing, and the creature

17 Target takes a -2 penalty to each roll of one stat

18 Target is reduced to a childhood version of themselves, disadvantage to strength rolls, advantage to dexterity rolls

19 Target is charmed by a random creature they know

20 An illusionary copy of a prominent foe in the target's past taunts them from afar

Description

Ancient rituals can tie these rare and unpredictable entities to a mortal creature, most times unwillingly. Avatars of Chaos were once spirits of the Feywild, though through strong binding magic, they are now tethered to one creature, and are forced to take all aggression out on them. These beings look like fey versions of their target. The Avatar is freed either when their target dies, or if a Banishment spell is cast on the target.

The avatars forced to torment unaware mortals often try to find mischief in the face of their own misfortune, but even an angry avatar may grow sympathetic. One of these spirits my give the occasional boon to a downtrodden target, though these favors vary in frequency, if at all.

These rituals were once used by archfey to defend their homeland, though mortals have since misused it for their own gain, and the suffering of their foes.

Dr_Corvus

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