Old One
An Old One is a tangle of tentacles, wings and a partial face, too large for anyone to have seen all of it at once. It is older than the Prime Plane and did not originate there, and only the part of it that fits is on this side. It sleeps for most of an age, and its sleep leaks into the world as cults, drowned towns and a dream shared along a coastline. It has been woken twice, and the coastlines where it woke are still empty.
- Physiology
- Aberration
- Size
- Gargantuan
- Speed
- 40 ft., fly 60 ft. (hover), swim 60 ft.
- Armor class
- 23 (geometry that does not resolve)
- Hit points
- 370 (20d20 + 160)
- Proficiency
- +6
- STR 28 +9 save +9
- DEX 14 +2 save +2
- CON 26 +8 save +14
- INT 26 +8 save +14
- WIS 24 +7 save +13
- CHA 26 +8 save +14
- Skills
- Arcana +14 , Insight +13 , Lore +14 , Perception +13
- Passive Perception
- 23
- Senses
- truesight 120 ft., darkvision 240 ft., telepathy 1000 ft.
- Languages
- Netherspeech, Primordial
- Damage resistances
- bludgeoning, piercing, slashing, fire, cold, lightning
- Damage immunities
- psychic, poison, necrotic
- Found in
- Abythis Sea Trench , Rift Breach , Oceanic Trench , Shallows
Traits
-
Alien Rejuvenation
The Old One cannot be banished, imprisoned or permanently killed by any means available on the Prime Plane. When it is reduced to 0 hit points, it disperses and re-forms at its resting place after 100 years.
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Dream Reach
Every creature that sleeps within 100 miles of it dreams of it. A creature that finishes a long rest in that area makes a Wisdom saving throw against DC 23 or gains no benefit from the rest and takes 4d10 psychic damage.
-
Horrifying Form
A creature that starts its turn able to see it makes a Wisdom saving throw against DC 23 or is Frightened for 1 minute. A creature that fails by 10 or more is Stunned for 1 minute instead.
-
Legendary Resistance
Three times per day, when it fails a saving throw, it can choose to succeed instead.
Actions
-
Multiattack
The Old One makes three Tentacle attacks, or two Tentacle attacks and uses Unmaking Thought.
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Tentacle
+15 to hit · reach 30 ft.
4d10 + 9 bludgeoning damage
A strike from one of its tentacles.
-
Unmaking Thought
DC 22 Intelligence save
The Old One targets a 60-foot radius within 300 feet of it. Every creature in the area makes an Intelligence saving throw, taking 12d10 psychic damage and being Stunned until the end of its next turn on a failure, or half as much damage and no other effect on a success. A creature reduced to 0 hit points this way dies outright.
-
Churning Surge
DC 22 Strength save
The sea or air within 120 feet turns over. Every creature in that area makes a Strength saving throw, taking 10d8 bludgeoning damage and being moved up to 60 feet in a direction of the Old One's choice on a failure, or half as much damage and no movement on a success. Recharges after it rolls a 5 or 6 on a d6 at the start of its turn.
-
Regard Legendary
One creature it can see within 300 feet makes a Wisdom saving throw against DC 23 or takes 6d10 psychic damage and has disadvantage on all rolls until the end of its next turn.
-
Reach Legendary
It makes one tentacle attack.
-
Elsewhere Legendary
It vanishes and reappears at a point it can see within 300 feet. Every creature within 20 feet of either point takes 4d10 psychic damage.