Alatreon

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

Multiattack. The alatreon makes two Claw attacks and one Bite or Tail attack.

Bite. Melee Weapon Attack. d20+15 to hit, reach 15 ft., one target. Hit: 22 (3d8 + 8) piercing damage. If the target is a large or smaller creature, it is grappled (escape DC 17). Until this grapple ends, the alatreon can't use its bite on another target.

Claws. Melee Weapon Attack. d20+15 to hit, reach 10ft., one target. Hit: 19 (3d6 + 8) slashing damage.

Tail. Melee Weapon Attack. d20+15 to hit, reach 20ft., one target. Hit: 22 (3d8 + 8) bludgeoning damage If the target is a creature, it must succeed on a DC 23 Strength saving throw or be knocked prone.

Ice Storm. The alatreon magically creates a hail of rock-hard ice that pounds to the ground in a 20-foot-radius, 40-foot-high cylinder centered on a point within 150 feet. Each creature in the cylinder must make a DC 23 Dexterity saving throw. A creature takes 17 (3d10) bludgeoning damage and 17 (3d10) slashing damage on a failed save, or half as much damage on a successful one.

Lightning Storm. The alatreon magically creates three bolts of lightning, each of which can strike a target the alatreon can see within 120 feet of it. A target must make a DC 23 Dexterity saving throw, taking 22 (4d10) lightning damage on a failed save, or half as much damage on a successful one.

Flame Strike. The alatreon magically creates a vertical column of fire roars down from the heavens in a location you specify. Each creature in a 10-foot-radius, 40-foot-high cylinder centered on a point within 40 feet of the alatreon must make a DC 23 Dexterity saving throw, taking 41 (9d8) fire damage on a failed save, or half as much damage on a successful one.

Breath Weapons (Recharge 5-6). The alatreon uses one of the following breath weapons:

• Lightning Breath. The alatreon exhales lightning in a 120-foot line that is 10 feet wide. Each creature in that line must make a DC 23 Dexterity saving throw, taking 88 (16d10) lightning damage on a failed save, or half as much damage on a successful one.
• Cold Breath. The alatreon exhales an icy blast in a 90-foot cone. Each creature in that area must make a DC 23 Constitution saving throw, taking 72 (l6d8) cold damage on a failed save, or half as much damage on a successful one.

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

Attack. The alatreon makes a Bite attack.

Storm (Costs 2 Actions). The alatreon uses its Lightning Storm or Ice Storm.

Tail Sweep(Costs 3 Actions). The alatreon sweeps its tail. Each creature within 30 feet of the alatreon must succeed on a DC 23 Strength saving throw, taking 35 (5d10 + 8) bludgeoning damage and be knocked prone on a failed save, or half as much damage and isn't knocked prone on a successful one. The alatreon can then fly 30 feet straight up into the air.