Elven Guardian of Tor-Slyphi

Elven Guardian of Tor-Slyphi
Medium humanoid (elf), neutral

Armor Class: 17 (studded leather armor)
Hit Points: 142 (15d8 + 75)
Speed: 30 ft., fly 60 ft.

STR: 16 (+3) | DEX: 20 (+5) | CON: 20 (+5) | INT: 12 (+1) | WIS: 18 (+4) | CHA: 14 (+2)

Skills: Acrobatics +9, Athletics +6, Perception +7
Senses: Darkvision 60 ft., passive Perception 17
Languages: Common, Elvish
Challenge Rating: 8 (3,900 XP)

Innate Spellcasting. The Guardian's spellcasting ability is Wisdom (spell save DC 15). The Guardian can innately cast the following spells, requiring no material components:

    At will: levitate
    2/day: fly, gust of wind

Actions

Multiattack. The Guardian makes two attacks: one with its glaive and one with its Air Elemental Attack.

Glaive. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 14 (1d10 + 9) slashing damage.

Air Elemental Attack. The Guardian can use one of the following attacks:

    Whirlwind Strike. The Guardian spins the glaive rapidly and unleashes a powerful whirlwind. Each creature within 10 feet of the Guardian must make a DC 15 Dexterity saving throw, taking 18 (4d8) bludgeoning damage on a failed save, or half as much damage on a successful one.
    Thunderous Wave. The Guardian slams the glaive into the ground, sending a powerful shockwave of air towards its foes. Each creature within 15 feet of the Guardian must make a DC 15 Strength saving throw, taking 21 (6d6) thunder damage on a failed save, or half as much damage on a successful one.

Legendary Actions

The Guardian can take 2 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The Guardian regains spent legendary actions at the start of its turn.

    Glaive Attack. The Guardian makes a glaive attack.
    Air Elemental Attack. The Guardian uses one of its air elemental attacks (Whirlwind Strike or Thunderous Wave).
    Wind Step. The Guardian uses its levitate ability to move up to 20 feet in any direction without provoking opportunity attacks.