As you hold up the piece of magicite, you draw on energy from the Elemental Plane of Water and call forth a manifestation of Syldra, the Dragon of the Deep.

A Huge manifestation of Syldra appears for the duration in an unoccupied area within 20m of you. Syldra is considered to be a creature that has HP equal to 30 + half of your maximum HP. If she drops to 0 HP, the spell ends and she dematerialises into a burst of water. She knows how to speak and read Ivalician, Draconic and Aquan, and you can communicate telepathically to one another. She has the following stats:

Syldra is summoned with six floating orbs of water that surround her. These orbs are used by Syldra's abilities, and emit light. If you have four or more orbs remaining, they shed bright light in a 6m radius and dim light for an additional 6m. If you have one to three motes remaining, they shed dim light in a 6m radius.

Syldra grants the ability to breathe water as per the Aqualung spell to all allies whom you designate who are touching her. This effect lasts for as long as they remain in contact with Syldra, and remains in effect for 1 hour after they stop touching her.

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

Incapacitated

• Aqua Shot: Syldra sends one of her orbs hurtling at a target. Make a ranged spell attack (+8 bonus to attack roll) against a target within 40m. On a hit, the target takes 2d6 + 4 Water damage. Whether you hit or miss, the orb is expended.
• Ice Burst (recharge 5-6): Syldra commands three of her orbs to spin around her rapidly, before freezing them and exploding them in a ring around her. Expend three orbs. All creatures within 4m of her must make a DC 16
  Basic
  Dexterity saving throw, taking 4d8 Ice damage. On a failed save, they also receive 1 level of
  Brittle
  for 2 rounds.
• Coalescing Water: Syldra bends existing water around her to form orbs around her. Provided that there is at least 30L of water within 10m of Syldra, she can bend the water such that there are six orbs floating around her.
• Thunderstorm (once per casting): Syldra uses her ultimate move, blasting a massive surge of water and lightning to gush from her mouth. All hostile creatures within a 6m wide, 20m long Line from Syldra must make a DC 16
  Basic
  Dexterity saving throw, taking 5d6 Water damage and 5d6 Lightning damage. On a failed save, they also become
  Paralysed
  until the end of their next turn.

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