Medium humanoid (any race), any alignment
Saving Throws Int +9, Wis +6
Skills Arcana +13, History +13
Damage Resistances damage from spells; bludgeoning, piercing, and slashing from nonmagical attacks (from stoneskin)
Senses passive Perception 12
Languages any six languages
Challenge 12 (8,400 XP) Proficiency Bonus +4
Traits
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.
Actions
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.