based on D&D 5th Edition
Goristro
Huge  Fiend Demon, Chaotic Evil

Armor Class 19  (natural)
Hit Points 310  (23d12+16)
Speed 40 ft. , swim 20 ft.



STR DEX CON INT WIS CHA
25  (+7) 11  (0) 25  (+7) 6  (-2) 13  (+1) 14  (+2)
Saving Throws Str +13, Dex +6, Con +13, Wis +7
Damage Resistances Bludgeoning, Fire, Frost, Lightning, Piercing, Slashing
Damage Immunities Poison
Condition Immunities Poisoned
Senses darkvision, passive Perception 17
Languages Abyssal
Challenge 17  (18000 XP)
Siege Monster. Deals double damage to objects and structures..
Magic Resistance. Has advantage on spell and magic saving throws.
Actions
Multiattack. Make two fist and one hoof attacks.
Fist. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 20 (3d8+7) bludgeoning damage.
Hoof. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 23 (3d10+7) bludgeoning damage. DC 21 strength saving throw or be knocked prone
Gore. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 45 (7d10+7) piercing damage.
Charge. If the creature moves at least 15 ft. and hits with a Gore attack after moving the target takes 38 (7d10) piercing damage. Target makes a DC 21 Strength save or can be pushed 20 ft. and knocked prone., for 38 (7d10) piercing damage in ft. Melee