Chronomancer Wizard

Multiattack. The chronomancer makes three Arcane Burst attacks.

Arcane Burst. Melee or Ranged Spell Attack: +8 to hit, reach 5 ft. or range 120 ft., one target. Hit: 20 (3d10 + 4) force damage.

Desynchronization. Each creature in a 20-foot cone originating from the chronomancer must make a DC 16 Constitution saving throw. On a failed save, a creature  is magically weakened as it is desynchronized from the time stream. While the creature is in this state, attack rolls against it have advantage and it has the poisoned condition. A weakened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Spellcasting. The chronomancer casts one of the following spells, using Intelligence as the spellcasting ability (spell save DC 16):

At will: dancing lights, mage hand, message, prestidigitation

2/day each: dispel magic, expeditious retreat, haste, mage armor, mirror image, slow

1/day each: disintegrate, temporal shunt

Time Slip (Recharge 4–6).  The chronomancer halves the damage it takes from an attack made against it, provided it can see the attacker. The chronomancer can then immediately teleport, along with any equipment it is wearing or carrying, up to 30 feet to an unoccupied space it can see.