Phossylaur

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Kaijan are incredibly large and powerful, and most civilizations will hide underground or will migrate when they are threatened by such a monstrous creature. However, despite their vast power, some kaijan have been killed. As large as kaijan are, they possess a vast amount of Essence, and sometimes this Essence binds to a kaijan’s corpse, turning it into a Phossylaur. These enormous creatures are undead psionic anomalies. Phossylaurs do not need to eat physical food as living kaijans do; instead, they feast on Essence, turning their victims into gray husks of their former selves.

Phossylaur

Monster Level: 33
Titan. Giant Undead Monstrosity (Kaijan)
STR DEX END AWR INT CHA
8 5 8 7 -3 7
Ref: 15 Fort: 18 Ant: 17 Log: 7 Will: 17
Body Composition
The Phossylaur has 1d3 heads, one torso, 1d4-1 tails, 1d2x2 arms, and 1d3x2 legs. Divide the total HP of each head component and tail component among the number of components rolled (a 1-headed creature has a head with 240 HP, while a 3-headed creature’s heads have 80 HP each). Attacks against the Phossylaur’s REF or FORT can target any of the Phossylaur’s components, but attacks against its ANT, LOG, or WILL must target its Head.
All Components Features
Siege Monster. The Phossylaur’s damage from any of its body components is doubled against inanimate objects and structures. It ignores DT against such targets.

Husks. A creature that dies as a result of psychic damage from the Phossylaur is regurgitated as a Phossyl Husk (stats below).

Head
Armor Rating 20 Resist Psionic 3, Psychic 5
Hit Points 240 Vulnerable Radiant 1 DR 5/Silver or Magical DT 12
Senses Blindsight 600 ft
Traits Immutable, Iron Will, Steel Mind
Head Features
If the Phossylaur’s head or heads all die, the whole Phossylaur dies.
Torso
Armor Rating 20 Immune Psychic
Hit Points 400 DT 20
Traits Immutable, Iron Will, Steel Mind
Torso Features
If the Phossylaur’s Torso dies, the whole Phossylaur dies. If the Phossylaur Takes a Rest and has one or more dead body parts but has a living Head and Torso, they all regain 1 hit point at the end of the Rest.

Sudden Recovery. When the Phossylaur’s torso is Bloodied, it regains its Scouring Breath.

Essence Siphon. When the Phossylaur kills a creature, its Torso gains Regen 10 for the next minute.

Psychic Aura. Creatures that begin their turn within 60 ft of the Phossylaur must make a DC 17 CHA check. On a fail, the creature takes 4 (1d8) psychic damage and is Demoralized until the start of its next turn.

Legs
Armor Rating 17 Immune Psychic
Hit Points 90 DT 20
Speed 30 ft Traits Immutable, Iron Will, Steel Mind
Leg Features
Legs. The Phossylaur's speed is reduced by 5 ft for each leg that has died.
Arms
Armor Rating 16 Immune Psychic
Hit Points 80 DT 15
Traits Immutable, Iron Will, Steel Mind
Tail
Armor Rating 16 Immune Psychic
Hit Points 10 DT 15
Traits Immutable, Iron Will, Steel Mind
Actions

The Phossylaur can MOVE and take THREE of the following actions or take the same action three times while one of its Heads is still alive. It cannot use an action with one of its body parts that has been killed.

Move (Legs). The Phossylaur can move up to its speed.

Claw (Arms). Reach 40 ft Natural Weapon. +8 vs REF. Hit: 21 (3d8+8) sharp damage.

Bite (Head). Reach 20 ft Natural Weapon. +8 vs REF. Hit: 21 (3d8+8) sharp damage and the creature is swallowed if it is Large or smaller. A swallowed creature is Restrained, Blinded, and takes 11 (2d8) psychic damage at the start of each of its turns.

OR the Phossylaur can MOVE and take ONE of the following actions.

Stomp (Legs). Reach 10 ft Natural Weapon. +8 vs REF. Hit: 40 (5d12+8) blunt damage and the creature falls Prone and is Stunned until the end of its next turn.

Trample (Legs). The Phossylaur can move up to its speed. It makes the following attack against each creature of its choice that it moved within 5 ft of during this movement. +8 vs REF. Hit: 32 (5d12) blunt damage and the creature falls Prone.

Swipe (Tail). 40 ft Cone Natural Weapon. +8 vs REF of each creature in the cone. Hit: 26 (4d12) blunt damage and the creature falls Prone.

Slap (Tail). 40 ft Line Natural Weapon. +8 vs REF of each creature in the line. Hit: 26 (4d12) blunt damage and the creature falls Prone and is Stunned until the end of its next turn.

Scouring Breath (Head) (1/Recoup). 90 ft Cone Natural Weapon. +8 vs FORT of each hostile creature in the area. Hit: 36 (8d8) psychic damage, 27 (6d8) necrotic damage, and the creature is pushed 30 ft, falls Prone, and is Stunned until the end of its next turn. Miss: ½ damage, the creature is pushed 15 ft, and the creature is Dazed until the end of its next turn.

Phossyl Husks

Phossyl Husks are undead creatures that died at the proverbial hand of the Phossylaur. A Phossyl Husk gains the Undead and Psionic tags. It retains its physical stats that it had. It retains its AWR, but its INT and CHA are reduced to -2. The Phossyl Husk gains Resist Psionic 4, and Vulnerable Divine 1. It retains all its natural weapon attacks.

It loses all features that it had, and gains the following feature.

Essence Incarnate. When the Phossyl Husk dies, the creature that killed it must roll 1d20. On a roll of 6 or higher, the husk dies. On a roll of 5 or less, it instead falls Prone and regains 1 HP.