Multiattack. The kraken makes two attacks: one with its claw and one with its tentacles.

Claw. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 30 (6d6 + 9) slashing damage.

Tentacles. Melee Weapon Attack: +14 to hit, reach 20 ft., one target. Hit: 30 (6d6 + 9) bludgeoning damage, and the target is grappled (escape DC 17). Until this grapple ends, the target is restrained.

Lightning Strike (Recharge 5–6). The kraken hurls a magical lightning bolt at a point it can see within 500 feet of it. Each creature within 10 feet of that point must make a DC 17 Dexterity saving throw, taking 54 (12d8) lightning damage on a failed save, or half as much damage on a successful one.