Alister Harabin, Echo Lich

Legendary Resistance (3/Day). If Alister fails a saving throw, he can choose to succeed instead.

Enhanced Portents (3/Day). Alister can change an opponents die roll or one of his rolls to one of the following numbers: 5, 10, 15. Modifiers apply to any changed roll.

Spellcasting. Alister is a 20th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 21, +15 to hit with spell attacks). Alister has the following wizard spells prepared:

Cantrips (at will): Mage hand, Infestation, Mind Sliver

1st level (4 slots): Detect Magic, Burning Hands, Shield, Mage Armor, Magnify Gravity

2nd level (4 slots): Blindness/Deafness, Darkness, Detect Thoughts, Fortunes Favour

3rd level (3 slots): Counterspell, Dispel Magic, Lightning Bolt, Major Image

4th level (3 slots): Raulothim's Psychic Lance, Arcane Eye, Banishment

5th level (3 slots): Scrying, Temporal Shunt, Negative Energy Flood

6th level (2 slot): Gravity Fissure, Mental Prison, Programmed Illusion

7th level (2 slot): Tether Essence, Firestorm

8th level (1 slot): Power Word Stun, Reality Break

9th level (1 slot): *Foresight, Time Ravage

* Alister casts these spells on itself before combat.

Turn Immunity. Alister is immune to any effect that turns undead.

Paralyzing Touch. Melee Spell Attack: +12 to hit, reach 5 ft., one creature. Hit: 4d8 lightning damage. The target must succeed on a DC 19 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.

Siphon Potential. Ranged Spell Attack: +10 to hit, reach 15 ft., one creature. Hit: 4d8 necrotic damage. The target must make a DC 19 Wisdom saving throw. On a fail, Alister heals hit points equal to the damage taken and, if the target is a spellcaster, he regains up to one spell slot below level 6 while the target loses the spell slot. The target has disadvantage on all rolls until the end of their next turn.

Manifest Echoes (5-6). Alister manifests two, translucent blue Echoes of his younger self. The Echoes each have AC 16, 1 hit point and immunity to all conditions. If it has to make a saving throw, it uses Alister's saving throw bonuses for the roll.

The Echoes act after Alister in initiative order. When an Echo is destroyed, Alister takes half of the damage. The Echoes can cast spells from Alisters spell pool up to level 5. Alister can control and summon the Echoes up to 1 mile away

Phasing Body. Alister's body rapidly phases in between the current plane and the ethereal plane. Alisters AC is increased by 6. Alister takes 10 radiant damage each time he takes this reaction. This can be used as a bonus action if Alister is being grappled (Escapes Grappled). He takes damage regardless.

Alister 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. Alister regains spent legendary actions at the start of his turn.

Cantrip. Alister casts a cantrip.

Paralyzing Touch (Costs 2 Actions). Alister uses his Paralyzing Touch.

Disrupt Life (Costs 3 Actions). Each non-undead creature within 20 feet of Alister must make a DC 19 Constitution saving throw against this magic, taking 7d8 necrotic damage on a failed save, or half as much damage on a successful one.

Blink (Costs 3 Actions). Alister blinks to a point within 50ft of his current location