As you hold up the piece of magicite, you draw on energy from the Elemental Plane of Air and call forth a manifestation of Fenrir, the Fang of the East Wind.

A Huge manifestation of Fenrir appears for the duration in an unoccupied area within 20m of you. Fenrir is considered to be a creature that has HP equal to 100 + half of your maximum HP. If he drops to 0 HP, the spell ends and he dematerialises into a gust of wind. He knows how to speak and read Ivalician, Auran and Sylvan, and you can communicate telepathically to one another. He has the following stats:

When you cast this spell, and as a bonus action on your turn, provided that Fenrir is within 100m of you and not

Incapacitated

• Ride the Wind: Until the end of the turn, Fenrir doubles his speed and has Fly speed equal to half of his total speed.
• Rending Claws: Fenrir makes one slashing attack with his claws against a creature within 4m of him. He makes a melee weapon attack (+10 to hit), and on hit, the target takes 4d6 + 5 Wind damage.
• Ecliptic Howl (recharge 5-6): Fenrir gives a loud howl, which bolsters allies. Until the start of your next turn, all allied creatures whom you designate within 20m of Fenrir gain the effects of Bravery.

  If it is night-time and the lunar phase is Waxing/Waning Gibbous (near Full Moon), then allies gain the effects of Bravega instead.

• Lunar Bay (once per casting): Fenrir gives a loud howl, causing the outline of the moon to briefly appear red, before a beam of dark energy materialises from the sky and strikes the target vertically. Select a point within 100m of Fenrir. All creatures within a 12m radius Sphere of that point must make a DC 16 Wisdom saving throw, taking 5d10 Dark damage and potentially becoming
  Berserk
  .

  Critical Success (+10). The target is unaffected.
  Success. The target takes half damage.
  Failure. The target takes full damage and is Berserk for 1 minute. A creature affected by this repeats the saving throw at the end of each of its turns to try and remove this effect.
  Critical Failure (–10). As failure, except the target takes 1.5× damage.

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  If it is night-time and the lunar phase is Waxing/Waning Crescent (near New Moon), creatures make the saving throw with Disadvantage and the Dark damage is maximised (total 50 Dark damage).

At the DM's discretion, Fenrir could perform other actions, such as interacting with objects. Fenrir is a Neutral creature, so if you or your allies are performing acts strongly not aligned with his, Fenrir can force you to make a DC 15 Charisma save at the end of your turn. On a failed save, Fenrir can dismiss himself back to the Elemental Plane of Air. On a successful save, Fenrir remains in your services, but the DC of this Charisma save increases by 5.