Fenrir

Armor Class 14

Hit Points 210 (20d12 + 80)

Speed 40 ft.

Initiative +1

Damage Immunities bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons

Senses passive Perception 15

Languages Giant (can't speak in wolf form)

Challenge 10 (5,900 XP)

Multiattack. In giant form, the fenrir makes two greatclub attacks or two rock attacks. In hybrid form it makes two attacks, one with its bite and one with its claws. In wolf form it makes two bite attacks.

Bite (Wolf or Hybrid Form Only. Melee Weapon Attack: +10 to hit, reach 10ft., one target. Hit: 22 (3d10 + 6) piercing damage. If the target is a giant or humanoid, it must succeed on a DC 15 Constitution saving throw or be cursed with fenrir lycanthropy.

Claw (Hybrid Form Only). Melee Weapon Attack: +10 to hit, reach 10ft., one target. Hit: 24 (4d8 + 6) slashing damage.

Greatclub. (Giant Form Only). Melee Weapon Attack: +10 to hit, reach 10ft., one target. Hit: 24 (3d8 + 6) bludgeoning damage.

Rock (Giant Form Only). Ranged Weapon Attack: +10 to hit, range 60/240 ft., one target. Hit: 22 (2d10 + 6) bludgeoning damage.