CR 5 – Type – Monstrosity – Geothermal Algalith
**Tier 2 play**
**Monster Name**: Geothermal Algalith
**Size, Type, Alignment**: Large Monstrosity, Neutral
**Core Stats**: Armor Class (AC): 15, Hit Points (HP): 110 (13d10 + 39), Speed: 30 ft., Swim 60 ft.
**Ability Scores**:
Strength 18 (+4),
Dexterity 12 (+1),
Constitution 16 (+3),
Intelligence 2 (-4),
Wisdom 14 (+2),
Charisma 1 (-5)
**Proficiencies**:
Saving Throws: Constitution +6, Wisdom +5
Skills: Perception +5, Stealth +4
Damage Resistances: Fire, Poison
Damage Immunities: Psychic
Condition Immunities: Charmed, Frightened
**Senses**: Blindsight 60 ft., Darkvision 60 ft., Passive Perception 15
Languages: Understands Primordial but cannot speak
Challenge Rating (CR): 5
**Special Abilities**:
– **Photosynthetic Regeneration**: At the start of its turn, the Geothermal Algalith regains 10 HP if it is in sunlight.
– **Toxic Spore Cloud**: As a bonus action, it can release a cloud of spores in a 15-foot radius. Creatures in the area must succeed on a DC 14 Constitution saving throw or be poisoned for 1 minute. They can repeat the saving throw at the end of each of their turns.
**Actions**:
– **Multiattack**: The Geothermal Algalith makes two attacks: one with its Tentacle and one with its Spore Blast.
– **Tentacle**: +8 to hit, reach 15 ft., one target. Hit: 15 (2d10 + 4) bludgeoning damage. If the target is a Medium or smaller creature, it is grappled (escape DC 16).
– **Spore Blast**: Ranged Weapon Attack: +6 to hit, range 60 ft., one target. Hit: 18 (4d8) poison damage, and the target must succeed on a DC 14 Constitution saving throw or be poisoned until the end of its next turn.
– **Toxic Spore Cloud (Recharge 5-6)**: As previously described, this ability affects multiple characters within a 15-foot radius around the Algalith.
**Description**: The Geothermal Algalith is a massive creature formed from a unique blend of microalgae and geothermal energy, thriving near hot springs and geothermal plants. Its body is a vibrant green, covered in thick, gelatinous layers that pulse with life. The creature typically lies dormant, camouflaged among the algae, but when threatened, it aggressively defends its territory using its tentacles and toxic spores. Though not particularly intelligent, its primal instincts drive it to protect its home fiercely. The Algalith often uses the terrain to its advantage, luring foes into the spore cloud and striking from the shadows.