Alpha Yek

Medium Fiend chaotic evil

STR	DEX	CON	INT	WIS	CHA
16 (+3)	16 (+3)	16 (+3)	15 (+2)	13 (+1)	10 (+0)

Saving Throws: Str +7, Dex +7, Con +7, Int +6
Skills: perception +5, stealth +7
Damage Immunities: poison
Damage Resistances: cold, fire, lightning; bludgeoning, piercing, and slashing from nonmagical attacks
Condition Immunities: poisoned
Senses: darkvision 120 ft., passive Perception 15
Languages: Abyssal, telepathy 120 ft.

Magic Resistance: The yek has advantage on saving throws against spells and other magical effects.
Pack Tactics: The yek has advantage on attack rolls against a creature if at least one of the yek's allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack: The alpha yek makes one bite attack and two claw attacks. It can make a bone shard attack in place of a claw attack if it has a bone shard available.
Bite: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 17 (4d6 + 3) piercing damage.
Claw: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (4d4 + 3) slashing damage.
Bone Shard: Melee or Ranged Weapon Attack: +7 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 8 (2d4 + 3) piercing damage and the target must make a DC 17 Constitution saving throw. On a failure, a piece of the bone breaks and sticks in the target's wound. The target takes 5 (2d4) piercing damage at the start of each of its turns as long as the bone remains lodged in its wound. A creature, including the target, can take its action to remove the bone by succeeding on a DC 15 Wisdom (Medicine) check. The bone also falls out of the wound if the target receives magical healing

A yek typically carries 3 (1d6) bone shards, which are destroyed on a successful hit. It can use its action to tear a bone shard from a corpse within 5 feet. Derro