Spellcasting. In addition to any other spells in this stat block, Ulwai can cast the following spells, using Charisma as the spellcasting ability (spell save DC 15):
Cantrips (at will): mage hand
1/day: fog cloud (concentration), see invisibility (concentration), sending

Storm Lash. Melee or Ranged Spell Attack: +7 to hit, range 5ft or 30ft., 1 target. Hit: 21 (6d6) lightning damage.

Gust of Wind (1/Day; 2nd-Level Spell; Concentration). A 10-foot-wide, 60-foot-long line of strong wind gusts from Ulwai for 1 minute. Each creature who starts their turn in that area must succeed on a DC 15 Strength saving throw or be pushed 15 feet away from Ulwai. Each creature in that area must spend 2 feet of movement for every 1 foot they move toward Ulwai. The gust disperses gas or vapor, and it extinguishes candles, torches, and similar unprotected flames. It has a 50 percent chance to extinguish protected flames like lanterns. Ulwai can use a bonus action to change the direction in which the wind blasts from them. 

Lightning Bolt (2/Day; 3rd-Level Spell). Ulwai fires magical lightning in a 5-foot-wide, 100-foot-long line. Each creature in the line must make a DC 15 Dexterity saving throw, taking 28 (8d6) lightning damage on a failed save, or half as much damage on a successful one. The lightning ignites flammable objects in the area that aren’t being worn or carried.

Taunt. Ulwai taunts a creature, forcing them to make a DC 15 Charisma saving throw. On a failed save, the target has disadvantage on ability checks and attack rolls until the end of their next turn.

Cutting Words (3/day). When a creature that Ulwai can see within 60 feet of her makes an attack roll, an ability check, or a damage roll, she can roll a d8 and subtract the result from the creature's roll.