Abyssal Dragon (5e Creature)
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Huge dragon (dragon), chaotic evil
Saving Throws Dex +9, Int +7, Wis +8, Cha +4
Legendary Resistance (2/day): If the dragon fails a saving throw, it can choose to succeed instead.
Undead Nature. The dragon does not need food, air, or water.
Multiattack. The dragon can use Crushing Bite attack. It then can attack once with its claws and one tail attack.
Claw. Melee Weapon Attack: +6 to hit, reach 15 ft., two target. Hit: 26 (3d10 + 6) slashing damage.
Crushing Jaws. Melee Weapon Attack: +8 to hit, reach 15 ft., one target. Hit: 26 (5d8 + 10) piercing damage. If the creatures armor class is under 17, then the dragon does not have to role to hit.
Tail. Melee Weapon Attack: +6 to hit, reach 25 ft., one target. Hit: 16 (3d8 + 5) bludgeoning damage. The target has to succeed on a DC 14 Strength check or will be knocked back 15 ft. and be knocked prone.
Abyssal Breath (Recharge 5-6). Melee Weapon Attack: The dragon exhales fire and acid in a 60 ft. cone. Each creature in that line must succeed a DC 20 saving throw, taking 40 (6d10 + 10) fire and acid damage, or take half as much on a successful one.
The Abyssal Dragon can take 4 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 Abyssal Dragon regains spent legendary actions at the start of its turn.
Attack. The dragon makes one two claw attacks and one tail attack.
Self Destruction (Costs 2 Actions). If the dragon is below 10 hit points, role a D20. If the role is under ten, the dragon explodes, dealing 30 fire and acid damage in a 30 ft. sphere. (Must Roll for Recharge on your turn)
Detect. The dragon make a Wisdom (Perception) check.
Insanity A creature within 30 ft. of the dragon must role a DC18 saving throw. On a failure, the creature becomes insane, seeing shadows and demons and lashing out at any creature near it. A lesser restoration spell can cure this.
The Abyssal dragon is not a living creature nor a non-living one. Rarely seen above ground, these dragons cause chaos and insanity wherever they go.