Atua ‘ai Tupuna

Magic Resistance. The Atua ‘ai Tupuna has advantage on saving throws against spells and other magical effects. 

Mind Link. All the Guardians have a special mind link that connects them across the islands. They can communicate via this mind link as long as they are on the same plane.

Multiattack. The Atua ‘ai Tupuna makes two attacks: one with its claws and one with its beak.

Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Beak. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) piercing damage.

Riua Protection of the Island Attack (Recharge on 5-6).  The Atua ‘ai Tupuna can  create the Riua teleport ring. It can teleport any number of creatures that are a threat to its island. The Riua creates a 15-foot cube centered on any point Atua ‘ai Tupuna can see. All creatures with in the cube must make a DC 21 Dexterity saving throw, being sent to the town of Riua on the mainland on a fail.

The Atua ‘ai Tupuna 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. The Atua ‘ai Tupuna regains spent legendary actions at the start of its turn.

Wing Attack. The Atua ‘ai Tupuna beats its wings. Each creature in a 10-foot radius of the Atua ‘ai Tupuna must succeed on a DC 19 Dexterity saving throw or take 13 (2d6 + 6) bludgeoning damage and be knocked prone, taking half damage and not being knocked prone on a success. The Atua ‘ai Tupuna can then fly up to half its flying speed.

Tail Attack. Melee Weapon Attack: +7 to hit, reach 15 ft., one target. 19 (2d10+8) bludgeoning damage. Target must make a successful DC 19 Dexterity saving throw or be knocked prone. 

Guardian Growl.  The Atua ‘ai Tupuna releases an ear shattering growl. All creatures in a 30-foot radius must make a DC 19 Constitution saving throw or take 19 (2d10+8) force damage and become stunned for one minute. On a success, they take half damage and are not stunned. Stunned creatures may repeat the saving throw at the end of each of their turns, the condition ending on a success.