Bukavhajira, the Stormborn Leviathan

Legendary Resistance (3/Day). If Bukavhajira fails a saving throw, it can choose to succeed instead.

Stormborn Manifestation. The presence of Bukavhajira distorts the weather. While it is above water, storms rage within a 5-mile radius, causing torrential rain, strong winds, and constant lightning strikes.

Tidal Colossus. While submerged, Bukavhajira is invisible to divination spells and abilities unless the caster is also underwater.

Devastating Presence. Creatures within 300 feet of Bukavhajira must make a DC 22 Wisdom saving throw or be frightened for 1 minute. A creature frightened in this way can repeat the save at the end of each of its turns, ending the effect on a success.

Multiattack. Bukavhajira makes three attacks: one with its Bite, one with its Tail, and one with Storm Surge.

Bite. Melee Weapon Attack: +18 to hit, reach 20 ft., one target. Hit: 70 (10d10 + 10) piercing damage.

Tail. Melee Weapon Attack: +18 to hit, reach 25 ft., one target. Hit: 55 (8d10 + 10) bludgeoning damage and the target must succeed on a DC 22 Strength saving throw or be pushed 30 feet away.

Storm Surge (Recharge 5-6). Bukavhajira channels its storm essence, releasing a burst of hurricane-force winds and lightning. Each creature within a 60-foot radius must make a DC 24 Dexterity saving throw, taking 90 (12d12) lightning and thunder damage on a failed save, or half as much on a success.

Abyssal Dive. Bukavhajira moves up to its swim speed without provoking opportunity attacks.

Thunderous Roar. All creatures within 60 feet must make a DC 22 Constitution saving throw or be deafened for 1 minute.

• Maelstrom Counter. When a creature within 10 feet hits Bukavhajira with a melee attack, it can use its reaction to unleash a violent gust of wind, forcing the attacker to make a DC 22 Strength saving throw or be knocked prone.

• Stormcall. Bukavhajira calls down a bolt of lightning on a target within 120 feet, dealing 50 (8d10) lightning damage.

• Tsunami Crash (Costs 2 Actions). Bukavhajira summons a massive wave in a 100-foot line. Creatures in the line must make a DC 24 Strength saving throw, taking 75 (10d12) bludgeoning damage and being knocked prone on a failure, or half as much on a success.

• Gale Leap. Bukavhajira moves up to 60 feet as a surge of wind lifts it from the water or ground.

Mythic Actions (Unlocked at Half HP)

When Bukavhajira drops to half HP, it fully embodies the wrath of the storm.

• Eye of the Storm (Recharge 5-6). For 1 minute, the area within 500 feet of Bukavhajira is engulfed in an apocalyptic storm. All creatures take 10 (3d6) lightning damage at the start of their turn.

• Cataclysmic Surge. Bukavhajira uses Storm Surge and Tsunami Crash simultaneously.