Magic Resistance. The archmage has Advantage on saving throws against spells and similar effects.
Spellcasting. The archmage casts one of the following spells, using Intelligence as the spellcasting ability (spell save DC 18):
At will: Detect Magic, Detect Thoughts, Mage Armor (included in AC), Mage Hand, Mind Spike (level 4 version), Prestidigitation
Protective Magic (3/Day). The archmage casts Counterspell or Shield in response to the spell's trigger, using the same spellcasting ability as Spellcasting.
Multiattack. The archmage makes four Arcane Burst attacks. It can replace one attack with a use of Spellcasting to cast Mind Spike (level 4 version).
Arcane Burst. Melee or Ranged Attack Roll: +10, reach 5 ft. or range 150 ft. Hit:24 (3d12 + 5) Force damage.
Masters of Magic