Burdakin Hahs

Decay. When Hahs deals damage to a creature they must make a DC 19 Constitution saving throw. On a failed save, their damage dealt to other creatures and walking speed is reduced by 15 until the end of their next turn. Only one creature can be affected by this at a time.

Sundering Decay. Creatures can't use the Disengage action after being dealt damage by Hahs.

Reconstruct. At the start of each turn, Hahs regain 10 hit points increasing to 20 if he is below half his hit point maximum.

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

Multiattack. Hahs makes to Rusted Sword attacks and one Dusted Arm attack against a separate target.

Rusted Sword. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: # (2d10 + 8) [Slashing] damage and 10 [Acid] damage. If he is below three quarters of his point maximum he regain hit points equal to the damage dealt.

Dusted Arm. Ranged Weapon Attack: +13 to hit, range 120 ft., one target. Hit:  (5d10) [Poison] damage and 20 [Acid} damage.  If he is below three quarters, creatures must make a DC 16 Strength saving throw or become restrained.

Suffocating Rage. Hahs can give a creature a -15 penalty to armor class if he had dealt damage more than once, until the start of his next turn. He then makes one Dusted Arm attack.

Hahs can only use reactions if he is at or below a quarter of his hit point maximum. He can make two reactions per round.

Break Down. When a creature attacks Hahs can give them a -2 penalty to attack rolls until he dealt damage to another creature.

Abhorrent Twist. When a creature misses an attack against Hahs, he can deal 10 acid damage.

Hahs 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.

Slashed (Costs 1 Actions). Hahs makes a Rusted Sword Attack.

Rusted Blast (Costs 2 Actions). Each creature within 50 feet regains 100 hit points and have vulnerability to all damage. Then must make a DC 16 Constitution Saving or take 5d10 acid Damage.

Corroded Minds (Costs 3 Actions). Each creature within 100 feet must make a DC 16 Strength saving throw or have their positions swapped around