Sylph CR: 3

Small elemental, usually neutral

Armor Class: 15 (Mage Armor)

Hit Points: 15 (4d6 - 4) 4d6-4

Speed: 30 ft , fly: 90 ft

STR

8 -1

DEX

15 +2

CON

8 -1

INT

15 +2

WIS

16 +3

CHA

19 +4

Saving Throws: Dexterity +4, Concentration +0, Charisma +6

Skills:

Animal Handling +6, Sleight of Hand +5, Stealth +8

Senses:

Darkvision 60', Passive Perception 13

Languages: Common, Auran

Challenge Rating: 3 ( 1800 XP)

Proficiency Bonus: +2

Innate Spellcasting. The sylph is a 5th-level spellcaster & its spellcasting ability is Charisma (DC 14 spell save, +6 spell attack bonus). The following spells are prepared & can be cast without material components:

At will: Dancing Lights, Gust, Invisibility (self only), Minor Illusion, Prestidigitation
3/day each: Featherfall, Magic Missile
2/day each: Mirror Image, Snowball Swarm
1/day each: Fly, Summon Elemental

Empowered Spellcasting (3/Day). When the sylph rolls damage for a spell, it can reroll up to three of the damage dice. It must use the new rolls.

Magic Resistance. The sylph has advantage on saving throws against spells & other magical effects.

Actions

Thunderous Burst. Melee or Ranged Spell Attack. +6 to hit, 5' reach or 120' range, one target. Hit: 9 (2d8) 2d8 thunder damage. If the sylph rolls an 8 on a d8 for this spell, it can roll another d8 & add it to the damage. The maximum number of d8's that can be added to the spell's damage per turn is 6.