BNW (Big Nightmare Worg)

Legendary resistance (3/day).  If the BNW fails a saving throw, it can choose to succeed instead.

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

Bite. Melee Weapon Attack: +20 to hit, reach 10 ft., 1 target. Hit: 56 (4d12+2d10+10) piercing damage. If the target is a creature it is grappled (escape 25). Until this grapple ends, this creature is restrained, and the BNW can not bite another target with this head.

Claw. Melee Weapon Attack: +19 to hit, reach 10 ft., 1 target. Hit: 36 (4d8+3d4+10) slashing damage. 

Tail Whip. Melee Weapon Attack: +19 to hit, reach 25 ft., 3 targets. Hit: 20 (2d8 +2) slashing damage.

Tail Stab. Melee Weapon Attack: +19 to hit, reach 25 ft., 1 target. Hit: 13 (3d6+4) piercing damage.

Tail Shot. Ranged Weapon Attack: +16 to hit, reach 90 ft., 4 targets. Hit: 18 (3d10+3) piercing damage, 7 (2d4+3) poison damage per barb. 4 barbs are shot from the tail, can make up to 4 targets or shoot more than one barb at a targets

Extra brain. 2 brains twice the thought, a BNW treats bonus actions as normal actions.

Keen Sense. Having 6 eyes, 2 noses, and 2 heads lends to a heightened tracking ability. the BNW can track any creature from the slightest trail, up to 3 months old.