Berukyurosu

Keen Sight: The Berukyurosu has advantage on Wisdom (Perception) checks that rely on sight.

Storm Rider: The Berukyurosu is continuously surrounded by stormy weather, as if it had cast control weather, making all weather conditions within 5 miles one step more severe and all conditions within 500 feet two steps more severe. Its movement and senses are never impeded by wind, fog, rain, snow, or other weather effects. If the Berukyurosu is killed, these stormy weather conditions persist for 1d6 days centered on the site of its death.

Multiattack: The Berukyurosu makes two attacks: one with its beak and one with its talons.

Beak: Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 27 (4d8 + 9) piercing damage

Talons: Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 23 (4d6 + 9) slashing damage, and the target is grappled (escape DC 19). Until this grapple ends, the target is restrained, and the Berukyurosu can’t use its talons on another target.

Thunderwhips: Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 21 (2d12 + 9) slashing damage, plus 11 (1d4 + 9) lightning damage

Thunderstrike: All of the Berukyurosu’s melee attacks deal 7 (2d6) lightning and 7 (2d6) thunder damage in addition to their normal damage. In addition, if the Berukyurosu hits a creature two or more times in one round, that target must make a DC 18 Constitution saving throw, being stunned for 1 round on a failed save, or deafened for 1 round on a success. If the Berukyurosu hits with all three attacks in one round, the target must make a DC 18 Dexterity saving throw or be blinded for 1 round.

Thunderflash. When the is struck in melee with a metal weapon, the attacker takes 7 (2d6) lightning and 7 (2d6) thunder damage and must make two Constitution saving throws as the Berukyurosu’s thunderstrike ability, as if struck by three attacks in the same round. If the target fails, they take full damage. If the target succeeds, they take no damage.