Ajax

Magic Resistance. Ajax has advantage on saving throws against spells and other magical effects.

Spellcasting. Ajax is an 14th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 16, +8 to hit with spell attacks).

Ajax has the following wizard spells prepared:

Cantrips (at will): eldritch blast, light, mage hand, minor illusion, sapping sting

1st level (4 slots): detect magic, ray of sickness, mage armor*, cause fear

2nd level (3 slots): shadow blade, mirror image, misty step

3rd level (3 slots): fear, fly, lightning bolt

4th level (3 slots): banishment, fire shield, stoneskin*

5th level (2 slots): cone of cold, scrying, mislead

6th level (1 slot): mental prison

7th level (1 slot): finger of death

*Ajax casts these spells on itself before combat.

Illusory Self

Ajax can create an illusory duplicate of yourself as an instant, almost instinctual reaction to danger. When a creature makes an attack roll against you, you can use your reaction to interpose the illusory duplicate between the attacker and yourself. The attack automatically misses you, then the illusion dissipates. Once you use this feature, you can’t use it again until you finish a short or long rest.

Dagger. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d4 + 2) piercing damage.