Aeva, the Temporal Regent

Immortal Form. Aeva cannot die from old age.

Temporal Foresight. Aeva has advantage on initiative rolls. Additionally, if Aeva is surprised at the beginning of combat and isn't incapacitated, she can act normally on her first turn.

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

Temporal Wards. In her humanoid form, Aeva's AC includes her Wisdom modifier.

Multiattack. Aeva makes two Temporal Greatsword attacks, or one Temporal Greatsword attack and uses Time Warp if available.

Temporal Greatsword. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 15 (2d6 + 8) slashing damage plus 18 (4d8) force damage.

Time Warp (Recharge 5-6). Aeva exhales a wave of shimmering temporal energy in a 60-foot cone. Nonmagical objects and vegetation in that area that aren't being worn or carried crumble to dust. Each creature in that area must make a DC 22 Constitution saving throw. On a failed save, a creature takes 36 (8d8) force damage and is magically desynchronized from the time stream. While a creature is desynchronized, attack rolls against it have advantage, and it has the poisoned condition. On a successful save, a creature takes half as much damage and isn't desynchronized. A desynchronized creature can repeat the saving throw at the end of each of its turns, ending the effect on itself after it succeeds on three of these saves.

Temporal Gate (1/Day). Aeva conjures a 20-foot-diameter, circular portal in an unoccupied space she can see within 30 feet of herself. The portal links to a precise location on any plane of existence at a point in time up to 8,000 years from the present, whether past or future. The portal lasts for 24 hours or until Aeva's concentration ends (as if concentrating on a spell). Travel through the portal is possible only by moving through its front. Anything that does so is transported to the destination, appearing in the unoccupied space nearest to the portal.

Reactive Temporal Shift. After Aeva uses Legendary Resistance or is hit by an attack roll, she can teleport up to 30 feet to an unoccupied space she can see. This movement does not provoke opportunity attacks.

Temporal Riposte. When a creature Aeva can see hits her with a melee attack, Aeva can halve the damage she takes from the attack and immediately make one Temporal Greatsword attack against that creature.

Slow Time. Immediately after a creature Aeva can see ends its turn, Aeva can target a creature she can see within 60 feet of herself that is desynchronized by her Time Warp. Until the desynchronized effect ends on the target, its speed becomes 0, and its speed can't increase.

Aeva 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. Aeva regains spent legendary actions at the start of her turn.

• Temporal Strike. Aeva makes one Temporal Greatsword attack.

• Rewind Step. Aeva teleports up to 30 feet to an unoccupied space she can see. This movement does not provoke opportunity attacks.

• Foresight Glimpse. Aeva gains advantage on the next saving throw or attack roll she makes before the end of her next turn.

• Accelerate Ally (Costs 2 Actions). Aeva touches one willing creature within 5 feet of her. That creature can immediately use its reaction to move up to its speed or make one weapon attack.

Temporal Dragon Form (Recharge 6). Aeva magically transforms into an Adult Time Dragon. Her statistics, other than her Intelligence, Wisdom, and Charisma scores (which remain 24, 20, and 22 respectively), are replaced by the statistics of an Adult Time Dragon. She retains her alignment, hit points, Hit Dice, and saving throw proficiencies. She gains the Adult Time Dragon's actions, reactions, and legendary actions. Her equipment merges with her new form. The transformation lasts for 1 hour, until she is reduced to 0 hit points, or until she uses a bonus action to revert to her humanoid form.