Black Figure

Special Trait: Immune to all conditions

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 Itelligence (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.

Dagger: Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d4 + 4) piercing damage.

At the beginning of each PC's turn in initiative the Black figure can move 5 ft. or make a saving throw if needed.

you can identify a spell as it’s being cast with an Intelligence (Arcana) check of DC 15