As a bonus action, the Bear King can assume the form of a shaggy grizzly bear, or a hybrid of his humanoid and bear forms. In alternate form the Bear King’s size increases to Large, and he can make bite and claw attacks. He remains in this form until he returns to human form as a bonus action or he falls unconscious or dies.

on initiative count 20 (losing initiative ties), the Bear King takes a lair action to cause one of the following effects; the Bear King can’t use the same effect two rounds in a row:- The Bear King magically conjures up a swarm of eight giant bees (use giant wasp statistics) to defend his lair. The bees act immediately, and on initiative count 20 in subsequent rounds. The bees remain until they’re killed or until the Bear King dismisses them as an action. The Bear King can use this action again, but no more than eight giant bees can be present at a time. - The Bear King targets a creature within the lair that he can see. The creature must succeed on a DC 15 Constitution saving throw or be magically transformed into a brown bear as if by a polymorph spell. At the beginning of its turn, a transformed creature repeats the saving throw. If it fails, the creature must use its action to attack one of the Bear King’s foes. If it succeeds, the effect ends and the creature returns to its normal form. The effect lasts until the creature succeeds on the saving throw or until the Bear King uses this lair action again.- The Bear King causes the ground in a 20-foot radius to tremble and shake. Any creatures in the affected area must succeed on a DC 15 Strength saving throw or suffer 7 (2d6) bludgeoning damage and fall prone. The ground continues to tremble until initiative count 20 on the following round, during which time the area is difficult terrain.

The Bear King has advantage on Perception (Wisdom) checks that rely on smell.

If the Bear King fails a saving throw, he can choose to succeed instead.

The Bear King regains 10 hit points at the start of his turn if he has at least 1 hit point.

the region surrounding Gloaming Crag is warped by the Bear King’s magic, which creates one or more of the following effects:- Within 10 miles of the Bear King’s lair, creatures have disadvantage on saving throws made to avoid contracting lycanthropy from a werebear.- Bees within 10 miles of the Bear King’s lair are easily agitated quick to attack. Insect swarms (bees or hornets) are common in the area, but they tend to ignore locals.- Emotions within 5 miles of the Bear King’s lair run high. Arguments quickly descend into physical scuffles and enjoyable get-togethers are likely to become raucous carousing or even brawls. If the Bear King dies, conditions in the area surrounding the lair return to normal over the course of 1d6 days.