Blight Lich Adept

Legendary Resistance (3/Day). If the adept fails a saving throw, it can choose to succeed instead.

Rejuvenation. If it has a phylactery, the destroyed adept gains a new body in 1d10 days, regaining all its hit points and becoming active again. The new body appears within 5 feet of the phylactery.

Spellcasting. The adept is an 13th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 17, +9 to hit with spell attacks). The adept has the following druid spells prepared:

Cantrips (at will): guidance, poison spray, thorn whip

1st level (4 slots): detect magic, fog cloud, thunderwave

2nd level (3 slots): gust of wind, hold person, moonbeam

3rd level (3 slots): sleet storm, protection from energy, dispel magic

4th level (3 slots): blight, polymorph

5th level (2 slots): antilife shell, contagion

6th level (1 slot): move earth, wind walk

7th level (1 slot): reverse gravity, plane shift

Turn Resistance. The adept has advantage on saving throws against any effect that turns undead.

Decomposing Touch. Melee Spell Attack: +9 to hit, reach 5 ft., one creature. Hit: 17 (5d6) necrotic damage, and the target must succeed on a DC 17 Constitution saving throw, or become poisoned for 1 minute. While poisoned, a creature must succeed on a DC 17 Constitution saving throw at the start of its turns to heal. Once a creature succeeds on the saving throw, the effect ends for it.