Detect Life. Ace can magically sense the presence of creatures up to 5 miles away that aren’t undead or constructs. She knows the general direction they’re in but not their exact location.

Regeneration. Ace regains 10 hit points at the start of its turn if it has at least 1 hit point.

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

Spellcasting. Ace is an 17th-level spellcaster. Its spellcasting ability is Charisma (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.

Multiattack: Ace can make multiple times. Either twice with the Quarterstaff or three times with the Katar.

Katar. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d4 + 2) piercing damage.

Quarterstaff. 
One Handed Melee Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 2) Bludgeoning damage.
Two Handed Melee Attack +6 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 2) Bludgeoning damage.

Consume Life. Ace can target one creature it can see within 5 feet of it that has 0 hit points and is still alive. The target must succeed on a DC 6 Constitution saving throw against this magic or take 2 death Saves. If the target dies, Ace regains (6d6) hit points.

Parry. Ace adds her Proficiency Bonus to its AC against one melee attack that would hit it. To do so, the Ace must see the attacker and be wielding a melee weapon.

Deflect Missiles. Ace can deflect or catch the missile when hit by a ranged weapon attack. The damage from the attack is reduced by 1d12 + 7. If the reduced damage is 0, she can catch the missile if it is small enough to hold in one hand. She can make a ranged attack with a range of 20/60 using the missile just caught, as part of the same reaction with proficiency.

Can take 3 Legendary Actions, choosing from the options below. Only one legendary action can be used at a time, and only at the end of another creature's turn. Spent legendary actions are regained at the start of each turn.

Create Fog (Costs 1 Action). Ace dissapears into a selfeminating thick fog originating from herself in a 15 foot radius lasting 2 turns. The radius increases with every active cast. All tiles within this area is counted a difficult terrain, and all creatures within cannot see further than 5 feet. Ace can see through the fog.

Disrupt Life (Costs 3 Actions). Each non-undead creature within 20 feet of Ace must make a DC 17 Constitution saving throw against this magic, taking (5d6) necrotic damage on a failed save, or half as much damage on a successful one.