Special Traits

Keen Smell. The Mutant Grizzly Bear has advantage on Wisdom (Perception checks) that rely on smell.

Rotten Flesh. If the Mutant Grizzly Bear's health is below 50% and it takes damage from a melee attack, it's putrid and highly toxic flesh will splatter off of its bones in all direction. Any creature within 5ft of the Mutant Grizzly Bear must succeed a CON 13 saving throw or take 2d4 poison damage.

Actions

Multiattack. The abomination makes two claw attacks or a bite and a claw attack.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage. If the target is a humanoid, it must succeed on a DC 14 Constitution saving throw or become poisoned.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Legendary Actions

Mutant Grizzly Bear can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Mutant Grizzly Bear regains spent legendary actions at the start of its turn.

Bloody Roar (1 action). Magical energy, bloody ichor and horrific sounds spew forth from the Mutant Grizzly Bear's rotting throat. Each creature that is within 30 feet of the Mutant Grizzly Bear and can hear it must succeed on a DC 13 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.