Adult White Dragon Heartless Variant

Shield of Darkness. Whenever this creature is targeted by a melee attack the attacker takes 1d6 necrotic damage.

Ice Walk. The dragon can move across and climb icy surfaces. Additionally, difficult terrain composed of ice or snow doesn't cost it extra movement.

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

Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 12 (2d10+3)piercing damage plus 8 (2d8) necrotic damage.

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 10 (2d6+3) slashing damage plus 8 (2d8) necrotic damage.

Tail. Melee Weapon Attack: +8 to hit, reach 15 ft., one target. Hit: 11 (2d8+3) bludgeoning damage.

Frightful Presence. Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 14 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.

Necrotic Breath (Recharge 5–6). The dragon exhales an dark blast in a 60-foot cone. Each creature in that area must make a DC 15 Constitution saving throw, taking 54 (12d8) necrotic damage on a failed save, or half as much damage on a successful one.

Summon Allies (Recharge 2-3). The Dragon summons heartless that is less or equal to a total CR 3.

The dragon 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 dragon regains spent legendary actions at the start of its turn.

Devour(Costs 2 Actions). An ally that the dragon(that is a heartless), can see forces that ally to give its darkness to the dragon. The dragon gains the hp that ally had.

Tail Attack. The dragon makes a tail attack.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 19 Dexterity saving throw or take 13 (2d6 + 6) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.