Earth Glide. The dao can burrow through nonmagical, unworked earth and stone. While doing so, the dao doesn't disturb the material it moves through.

Elemental Demise. If Zafaa dies, her body disintegrates into crystalline powder, leaving behind only equipment the dao was wearing or carrying.

Innate Spellcasting. Zafaa's innate spellcasting ability is Charisma (spell save DC 19, +7 to hit with spell attacks). It can innately cast the following spells, requiring no material components:

At will: detect evil and good, detect magic, stone shape
3/day each: passwall, move earth, tongues
1/day each: conjure elemental (earth elemental only), gaseous form, invisibility, phantasmal killer, plane shift, wall of stone, earthquake, bones of the earth.

Sure-Footed. The dao has advantage on Strength and Dexterity saving throws made against effects that would knock it prone.

Multiattack: Zafaa makes three attacks.

Eldritch Weapon: Zafaa can create a glowing green replica of any type of weapon she pleases. Ranged: 300 ft, one target. Melee: 10 ft, one target. Hit: 1d10+9 force damage.