Immutable Form. Argoth is immune to any spell or effect that would alter its form.
Magic Resistance. Arghoth has advantage on saving throws against spells and other magical effects.
Magic Weapons. Argoth's weapon attacks are magical.
Multiattack. Argoth makes two Crushing Slam attacks if within melee range or one Energy Surge attack if within ranged attack range.
Crushing Slam. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 21 (4d8) bludgeoning damage.
Energy Surge. Ranged Weapon Attack: +6 to hit, reach 60 ft., one target. Hit: 24 (6d8) necrotic damage.
Reactive Stones: When Argoth takes 30 or more damage from a single attack, a stone shard detaches and transforms into a Small Stone Construct (AC 15, HP 25, Slam: +6 to hit, 10 bludgeoning damage). Argoth can have up to three Stone Constructs active at a time.
Remember to adjust the monster's stats based on your party's capabilities and the desired difficulty of the encounter. You can tweak its hit points, damage, or add additional abilities.
Description
Argoth is a massive, corrupted stone golem that once served as the guardian of the ruined temple. Over time, dark magic has seeped into its core, twisting its form and granting it malevolent power. Its body is covered in pulsating veins of black energy, and its eyes glow with an eerie, crimson light. Argoth's limbs are adorned with ancient, crumbling runes, remnants of the temple's lost civilization.
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