Undead Druid of Stars

Magic Resistance. Undead Druid of Stars has advantage on saving throws against spells and other magical effects.

Spellcasting. The Undead Druid of Stars is a 10th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 15, +7 to hit with spell attacks). The Undead Druid of Stars can cast following spells:
At will: Primal Savagery, Guiding Bolt
3/day: Thunderwave, Earth Tremor
2/day: Spike Growth, Erupting Earth
1/day: Blight, Insect Plague

Multiattack. Undead Druid of Stars makes two Shillelagh attacks.

Shillelagh. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 8 (1d8 + 3) bludgeoning damage plus 7 (2d6) necrotic damage. 

Primal Savagery. Melee Spell Attack: +7 to hit, reach 5 ft., 1 target. Hit: 11 (2d10) acid damage plus 7 (2d6) necrotic damage. 

Guiding Bolt. Ranged Spell Attack: +7 to hit, range 120 ft., 1 target. Hit: 14 (4d6) radiant damage. 

Fallen Stars. Ranged Spell Attack: +7 to hit, range 60 ft., 1 target. Hit: 12 (2d8+3) necrotic damage.

Under the Dark Star. Whenever a creature within 30 ft. of Undead Druid of Stars is about to make an attack roll, a saving throw, or an ability check, Druid can use its reaction to roll a d6 and subtract the number rolled from the total.