Awakened Pyrakath

Coiled Guardian. Pyrakath has advantage on Strength (Athletics) checks to grapple or restrain creatures. While coiled around a pillar or large object (as in its image), it has advantage on Dexterity saving throws against effects that would move it.

Lava Wake. The ground Pyrakath moves over becomes difficult terrain and hot to the touch. Creatures ending their turn there take 7 (2d6) fire damage.

Flame Storage Vulnerability. While storing flames (see Flame Breath), Pyrakath’s AC is reduced by 3, and it has vulnerability to cold damage. Cold damage interrupts the storage (no breath attack).

Multiattack. Pyrakath makes two attacks: one with its Bite and one with its Tail Lash or Flame Storage.

Bite. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 20 (3d8 + 7) piercing damage plus 7 (2d6) fire damage.

Tail Lash. Melee Weapon Attack: +12 to hit, reach 20 ft., one target. Hit: 24 (3d10 + 7) bludgeoning damage. On a hit, the target must succeed on a DC 20 Strength saving throw or be knocked prone or grappled (escape DC 20).

Flame Storage. Pyrakath inhales deeply, storing flames for its next turn. It glows brightly (no Stealth possible) and gains the Flame Storage Vulnerability trait until the start of its next turn. Additionally, it cannot use legendary actions while storing flames.

Flame Breath (Start of Turn, if Flames Stored). Pyrakath unleashes a 90-foot-long, 30-foot-wide arc of fire. Each creature in the area must make a DC 20 Dexterity saving throw, taking 66 (12d10) fire damage on a failed save, or half as much damage on a successful one.

The stored flames are expended and the affected area is treated as Lava Wake terrain.

Molten Recoil. When Pyrakath takes cold damage while using Flame Storage, the stored flames violently rupture outward. Creatures within 10 feet of Pyrakath must succeed on a DC 20 Dexterity saving throw or take 10 (3d6) fire damage.

Pyrakath immediately loses the Flame Storage state and cannot use Flame Breath on its next turn.

Pyrakath can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Pyrakath regains spent legendary actions at the start of its turn.

Detect. Pyrakath makes a Wisdom (Perception) check.

Tail Lash (Costs 2 Actions). Pyrakath makes one Tail Lash attack.

Lava Spit (Costs 2 Actions). Pyrakath spits a glob of lava at a point within 60 feet. Creatures within 10 feet of the point must succeed on a DC 20 Dexterity saving throw or take 21 (6d6) fire damage and be restrained by cooling lava (escape DC 20 as an action).