The colláis is a large, deer-like creature covered in thick, black fur. A great rack of antlers grows from its thick skull, in which prominent eye sockets display two red embers for eyes. The monster has no mouth; instead, a coarse beard grows in its place.

Summoned Protector. If a forest village is in danger, the villagers might perform a ritual sacrifice to summon a colláis. Once the ritual is complete, the creature appears in the branches of a nearby tree. It then stalks the village and its surroundings. A colláis returns to its home plane after 24 hours.


Large monstrosity, neutral
Armor Class 16 (natural armor)
Hit Points 150 (20d10 + 40)
Speed 40 ft.
19 (+4) 15 (+2) 14 (+2) 10 (+0) 17 (+3) 13 (+1)

Saving Throws Cha +5
Skills Intimidation +9, Perception +7
Damage Resistances bludgeoning, piercing, and slashing damage from nonmagical attacks
Condition Immunities charmed, frightened
Senses darkvision 120 ft., passive Perception 17
Languages understands Common and Sylvan but can’t speak
Challenge 10 (5,900 XP)

Impale and Toss. When the colláis hits a Medium or smaller creature with a gore attack, it can use a bonus action to impale and toss the creature. The target must succeed on a DC 16 Strength saving throw or take 11 (2d10) piercing damage and be flung up to 10 feet away from the colláis in a random direction and knocked prone.

Magic Resistance. The colláis has advantage on saving throws against spells and other magical effects.


Multiattack. The colláis makes one gore attack and two hooves attacks.

Gore. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage.

Hooves. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.

Cry of the Forest. The colláis sounds a dreadful and reverberating call. Each creature within 100 feet of the colláis that can hear the cry must succeed on a DC 16 Charisma saving throw or be frightened until the end of its next turn. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the colláis’s Cry of the Forest for the next 24 hours. Forest-dwelling beasts and monstrosities with an Intelligence of 4 or lower automatically succeed or fail on this saving throw, the colláis’s choice.

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