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

Spellcasting. Zagmira is an 18th-level spellcaster. Her spellcasting ability is Intelligence (spell save DC 17, +9 to hit with spell attacks). The archmage can cast disguise self and invisibility at will and has the following wizard spells prepared:

Cantrips (at will): fire bolt, light, mage hand, prestidigitation, shocking grasp, silent image, minor illusion

1st level (4 slots): detect magic, identify, mage armor*, magic missile, color spray

2nd level (3 slots): detect thoughts, mirror image, misty step, phantasmal force, suggestion, tasha's mind whip, mirror image*

3rd level (3 slots): counterspell, fly, fireball, haste, hypnotic pattern

4th level (3 slots): banishment, fire shield, phantasmal killer, greater invisibility, stoneskin*

5th level (3 slots): cone of cold, scrying, wall of force, seeming, mislead, modify memory, dominate person

6th level (1 slot): globe of invulnerability, mental prison, programmed illusion

7th level (1 slot): teleport, simulacrum, project image

8th level (1 slot): illusory dragon, mind blank*

9th level (1 slot): Weird

*Zagmira casts these spells on itself before combat.

Flexible Illusionist. As a master illusionist, Zagmira can cast the following spells as bonus actions: 

minor illusion, color spray, phantasmal force, hypnotic pattern, phantasmal killer

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.