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

Spellcasting. The archmage is an 18th-level spellcaster. Its 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 - 1st level (4 slots): detect magic, identify, mage armor*, magic missile - 2nd level (3 slots): detect thoughts, mirror image, misty step - 3rd level (3 slots): counterspell, fly, lightning bolt - 4th level (3 slots): banishment, fire shield, stoneskin* - 5th level (3 slots): cone of cold, scrying, wall of force - 6th level (1 slot): globe of invulnerability - 7th level (1 slot): teleport - 8th level (1 slot): mind blank* - 9th level (1 slot): time stop * The archmage casts these spells on itself before combat.