Bone Crusher Hound

Magic Resistance. The Bone Crusher Hound has advantage on saving throws against spells and other magical effects.

Bone Crusher: The Bone Crusher Hound attacks deal magical damage, additionaly bludgeoning damage dealt by the Bone Crusher Hound ignores resistance. 

Bane of Bones: Any creature hit by bludgeoning damage dealt by the Bone Crusher Hound must succeed in a DC 20 Constitution Saving throw, having thier bones crushed on a failure, creatures with crushed bones take 1d12 piercing damage for every 5ft they move, this effect ends if the creature is healed, creatures with no bones do not suffer from this effect.

Multiattack: The Bone Crusher Hound makes tree attacks using its attack action, one Crushing Bite attack, one Bone Crusher Claw attack, and one Blunt Tail attack or Bone Shard Attack or any combination of each.

Crushing Bite: Melee Weapon Attack: +12 to hit, 5ft range, one target, for 3d12+8 bludgeoning damage, a creature hit by this attack must succeed in a DC 20 Dexterity saving throw, being restrained by the Bone Crusher Hound on a failure, a restrained creature can use its action to attemtp to escape the restrains by succeedin in a DC 20 Strength saving throw.

Bone Crusher Claw: Melee Weapon Attack: +12 to hit, 5ft range, one target, for  3d10+8 bludgeoning damage, creatures hit by this attack must succeed in a DC 20 Strenght saving throw, falling prone on a failure.

Blunt Tail: Melee Weapon Attack: +12 to hit, 10ft rangem one target, for 3d8+8 bludgeoning damage, creatures hit by this attack must succeed in a DC 20 Strenght saving throw, being pushed back 5ft on a failure.

Bone Shard: Ranged Weapon Attack: +7 to hit, 90ft range, one target, for 3d8+3 bludgeoning damage, 

Demonic Howl (recharge 6) All creatures within 60ft of the Bone Crusher Hound must succeed in a DC 20 Wisdom saving throw, being frigthened of the Bone Crusher Hound until the end of their next turn on a failure, 

Chew: The Bone Crusher Hound can as a bonus action chew on a creature restrained by its Crushing Bite, dealing 3d12 bludgeoning damage to it.