Ancient Time Dragon

Time Draw: This dragon does not require gills to survive in water, but instead draws upon air from it's past. Doing so, it does not require air.

Time Warp: This Dragon has an aura of warped time always around it. Any Creature that comes within 30ft of this dragon is affected by the slow spell until it leaves this area.

Time Magic: 3/day per spell (Stop Time: for 2 rounds, Reverse Time: 2 rounds, Fast forward Time: Double the number of actions, bonus actions, reactions, and legendary actions it has for 2 rounds) 

Rift Walker: When this dragon steps into a rift, it can travel to any location with a rift. If a creature occupies the area at which the dragon emerges, it must succeed on a DC 20 saving throw, or receive 50 bludgeoning damage.

Multiattack: This dragon can attack three times, Once with it's bite, twice with it's claws.

Bite: Melee Weapon Attack: +16 to hit, reach 20 ft., 1 target. Hit: 15 (6d8+13) piercing damage. When this attack hits a creature, the creature is petrified. If the creature was under the effects of Time Breath, this attack deals an additional 10 piercing damage.

Claw: Melee Weapon Attack: +16 to hit, reach 20 ft. 1 target. Hit: 11 (6d6+13) Slashing damage.

Wing Attack. Melee Weapon Attack: +20 to hit, reach 10Ft., one creature. Hit: (4d6+13) Bludgeon.

Timed Strike: After being struck three times, receiving any form of damage from each one, he can resend up to three attacks, attacking as if he was wielding the weapon or casting the spell.

Age: A creature this dragon can see must make a WIS DC 20 save or becomes 1d6x100 years older or younger depending on what the dragon chooses.

Time Breath (Recharge 5-6). The dragon exhales a cone of rifts, and shatters the time barrier in a 100 ft. cone. Each creature caught in this blast must succeed on a DC 27 dexterity saving throw. If failed, the creature can still act as normal, but it's attacks do no damage, and at the end of it's turn it is returned to it's previous location. If succeeded, the creature can attack normally, but at the end of it's turn it is returned to a location in the time cone of the dragon's choosing. The dragon's time cone remains there until it casts this ability again. A creature wishing to escape the time cone must use it's action and succeed a DC 23 dexterity saving throw.

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 29 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.

Rewind: When this dragon drops below 500 hit points, it quickly rewind's its movement, and can travel to any location that it has been at in the last 24 hours. It gains the amount of hit points it had at that time.

Split in Time: When this dragon is struck, the area on which the creature stands opens a time rift suddenly. This has the same effect as Time Breath, but the creature can deal damage even if they fail the saving throw. However, the creature is still forced into moving back to it's previous location each turn.

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.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 26 Dexterity saving throw or take (4d6+13) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Age (Costs 2 Actions) Uses Age ability.

Rift (Costs 1 Action) Creates a rift at the location of the dragon and at the location of another creature it can see.