Spellcasting. The lich is an 19th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 20, +12 to hit with spell attacks). The lich has the following wizard spells prepared:

Cantrips (at will): mage hand, toll the dead, frostbite

1st level (5 slots): catapult, frost fingers, ice knife, charm person

2nd level (4 slots): enlarge/reduce, detect thoughts, alter self, mirror image

3rd level (4 slots): animate dead, summon undead, vampiric touch, fireball

4th level (3 slots): blight, fire shield

5th level (2 slots): danse macabre, scrying

6th level (2 slot): disintegrate, globe of invulnerability, Create Undead, [magic jar

7th level (1 slot): finger of death, teleport

8th level (1 slot): clone, abi-dalzim's horrid wilting

9th level (1 slot): invulnerability

Turn Vulnerability. Zik has disadvantage on saving throws against any effect that turns undead.

Chilling Glare. Ranged Spell Attack: +12 to hit, reach 5 ft., one creature. Hit: 10 (3d6) cold damage. The target must succeed on a DC 18 Constitution saving throw or be paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

The lich can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The lich regains spent legendary actions at the start of its turn.

Cantrip. The lich casts a cantrip.

Chilling Glare (Costs 2 Actions). Zik uses Chilling Glare

Disrupt Life (Costs 3 Actions). Each non-undead creature within 20 feet of the lich must make a DC 18 Constitution saving throw against this magic, taking 21 (6d6) necrotic damage on a failed save, or half as much damage on a successful one.