Archmage (Revised)

Nondetection. The archmage is unaffected by anything that would sense its emotions or alignment, read its thoughts, or magically detect its location, and no spell can gather information about the archmage, observe it remotely, or control its mind.

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

Multiattack. The archmage makes two Arcane Burst attacks.

Arcane Burst. Melee or Ranged Attack Roll: automatic hit, reach 5 ft. or range 150 ft. Hit: 22 (4d10) Force damage, and the target can’t make Opportunity Attacks until the start of its next turn.

Spellcasting. The archmage casts one of the following spells using Intelligence as the spellcasting ability (spell save DC 17, +9 to hit with spell attacks):

at will: detect magic, light, prestidigitation, mage hand, identify, disguise self, invisibility

3/Day: cone of cold (Level 7 version)

1/day each: scrying, teleport, fly, wall of force, detect thoughts, banishment, dimension door

Misty Step (3/Day). The mage casts Misty Step, using the same spellcasting ability as Spellcasting.

Protective Magic (3/Day). The archmage casts Counterspell in response to the spell’s trigger, using the same spellcasting ability as Spellcasting.