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Corrupted Eldertree - AI-generated fantasy Monster

Corrupted Eldertree

Once an elder guardian of the Sylvros Evergreen Court, this tree stood beside a sacred primal shrine and sheltered generations of wardens beneath its boughs. Shadow corruption entered through its roots during a hidden Tribunal rite, transforming protection into possession. The creature now believes every living thing in the grove must be preserved through death, and it spreads the blight toward other shrines.

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HugePlant(Blighted guardian)CR CR 10, severe solo guardian encounterChaotic evil

Corrupted Eldertree

corrupted guardianplantblightshadowSylvros Evergreen Courtshrine bossarea controllerlair monster
HP150AC17, natural armorSPDSpeed 20 ft., Root movement: The eldertree ignores nonmagical difficult terrain caused by plants, roots, or undergrowth., Rooted stance: While touching the ground, it has advantage on checks and saves against being moved or knocked prone.CR10 (5,900 XP)PerceptionSurvivalStealth
STR
22
save
DEX
8
CON
20
save
INT
6
WIS
14
save
CHA
10
Rooted Fortitude. The eldertree has advantage on saving throws and ability checks against effects that would move it or knock it prone.
Corrupted Aura. A creature that starts its turn within 10 feet of the eldertree takes 5 necrotic damage.
Blightbound Vulnerability. The eldertree has vulnerability to radiant damage. This vulnerability reflects the shadow corruption embedded in its heartwood.
Blightheart Regeneration. While the eldertree has at least 1 hit point and is touching the ground in its lair, it regains 5 hit points at the start of its turn if it is within 10 feet of a corrupted root cluster. This trait stops functioning until the next dawn if a creature deals radiant damage to the root cluster or cleanses the shrine.
Multiattack. The eld­er­tree makes two Slam attacks. It can replace one attack with Entangling Roots if available.
Slam. Melee Weapon Attack: to hit, reach 15 ft., one target. Hit: 17 () bludgeoning damage plus 7 () necrotic damage. If the target is a creature, it must succeed on a Strength saving throw or be pushed up to 10 feet.
Entangling Roots. Roots erupt from the ground in a 20-foot-radius circle centered on a point the elder tree can see within 60 feet. Each creature in that area must make a Dexterity saving throw. On a failed save, a creature takes 10 () piercing damage and is restrained for 1 minute. On a successful save, it takes half as much damage and is not restrained. A restrained creature can repeat the save at the end of each of its turns, ending the effect on itself on a success. The roots wither after 1 minute or when the elder tree uses this action again.
Shadow Burst. The elder tree targets one creature it can see within 60 feet. The target must make a Constitution saving throw, taking 9 () necrotic damage on a failed save, or half as much damage on a successful one. A creature that fails the save cannot regain hit points until the start of the elder tree's next turn.
Thorned Reprisal. When a creature the eldertree can see hits it with a melee attack, the eldertree causes thorned bark to erupt around the attacker. The attacker must succeed on a Dexterity saving throw or take 7 () piercing damage and have its speed reduced by 10 feet until the end of its next turn.
Branch Strike. The eldertree makes one Slam attack against a creature within reach.
Shadow Burst. One creature the eldertree can see within 60 feet must succeed on a Constitution saving throw or take 9 () necrotic damage. The creature cannot regain hit points until the start of the eldertree's next turn.
Rootbound Advance (Costs 2 Actions). The eldertree moves up to half its speed without provoking opportunity attacks. During this movement, it can move through nonmagical plants and ignores difficult terrain created by its own roots.
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