Valeria Nightshade

Evasion. If the guild leader is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, it instead takes no damage on a success and only half damage on a failure.

Sneak Attack. Once per turn, the guild leader can deal an extra 21 (6d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the guild leader that isn't incapacitated and the guild leader doesn't have disadvantage on the attack roll.

Guild Leader's Presence. The guild leader's mere presence inspires and motivates its allies. Friendly creatures within 30 feet of the guild leader gain advantage on saving throws against being frightened.

Master Tactician. The guild leader excels in strategic thinking and can quickly assess the battlefield. At the start of each of its turns, the guild leader can choose one creature it can see. Until the start of the guild leader's next turn, all attacks made against that creature have advantage, and the chosen creature has disadvantage on saving throws.

Multiattack. The guild leader makes three rapier attacks.

Rapier. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) piercing damage.

Cunning Action. On each of its turns, the guild leader can use a bonus action to take the Dash, Disengage, or Hide action.

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