Volcanic Snake

Born From Fire. Due to the volcanic snake's adaption to the elements of the volcano they are immune to fire damage and can swim through lava with a swim speed of 60ft when in lava.

Hot Body. Any attacks against the snake using non-magical weapons, excluding adamantine, are destroyed after hitting the creature and causing damage. Wooden weapons burst into flames, stone weapons crumble to dust, and metal weapons melt due to heat.

Multiattack. The snake can use it's Frightful Presence. It then makes an attack with its Bite. If a bite hits a creature frightened by the snake's Frightful Presence that creature is grappled and the snake uses consume.

Frightful Presence. Each creature of the snake's choice that is within 120 feet of the snake and aware of it must succeed on a DC 16 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the snake's Frightful Presence for the next 24 hours.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 38 (13d4 + 6) [Piercing] damage plus 21(6d6) fire damage

Consume. The snake consumes a medium or smaller creature grappled by it. the consumed creature is restrained the creature takes 2d10 acid damage at the start of each of it's turn while consumed by the snake. If the snake moves the consumed creature moves with it. The snake may have two creatures consumed at a time.

Sulphur Breath (Recharge 5-6). The volcanic snake exhales volcanic sulfur in a 60ft cone. Each creature in that area must succeed on a DC 18 Constitution saving throw or take 6d10 acid damage.