Chapter 1: Something in the Water

At 2nd level, you gain the ability to harness constellations' power to alter your form. As a bonus action, you can expend a use of your Wild Shape feature to take on a starry form, rather than transforming into a beast.

While in your starry form, you retain your game statistics, but your body becomes luminous; your joints glimmer like stars, and glowing lines connect them as on a star chart. This form sheds bright light in a 10-foot radius and dim light for an additional 10 feet. The form lasts for 10 minutes. It ends early if you dismiss it (no action required), are incapacitated, die, or use this feature again.

Whenever you assume your starry form, choose which of the following constellations glimmers on your body; your choice gives you certain benefits while in the form:

Archer. A constellation of an archer appears on you. When you activate this form, and as a bonus action on your subsequent turns while it lasts, you can make a ranged spell attack, hurling a luminous arrow that targets one creature within 60 feet of you. On a hit, the attack deals radiant damage equal to 1d8 + your Wisdom modifier.

Chalice. A constellation of a life-giving goblet appears on you. Whenever you cast a spell using a spell slot that restores hit points to a creature, you or another creature within 30 feet of you can regain hit points equal to 1d8 + your Wisdom modifier.

Dragon. A constellation of a wise dragon appears on you. When you make an Intelligence or a Wisdom check or a Constitution saving throw to maintain concentration on a spell, you can treat a roll of 9 or lower on the d20 as a 10.

At 10th level, the constellations of your Starry Form improve. The 1d8 of the Archer and the Chalice becomes 2d8, and while the Dragon is active, you have a flying speed of 20 feet and can hover.

Moreover, at the start of each of your turns while in your Starry Form, you can change which constellation glimmers on your body.

4th-level conjuration

Casting Time: 1 action
Range: 90 feet
Components: V, S, M (air, a pebble, ash, and water inside a gold-inlaid vial worth at least 400 gp)
Duration: Concentration, up to 1 hour

You call forth an elemental spirit. It manifests in an unoccupied space that you can see within range. This corporeal form uses the Elemental Spirit stat block. When you cast the spell, choose an element: Air, Earth, Fire, or Water. The creature resembles a bipedal form wreathed in the chosen element, which determines certain traits in its stat block. The creature disappears when it drops to 0 hit points or when the spell ends.

The creature is an ally to you and your companions. In combat, the creature shares your initiative count, but it takes its turn immediately after yours. It obeys your verbal commands (no action required by you). If you don’t issue any, it takes the Dodge action and uses its move to avoid danger.

Medium elemental
Armor Class: 15 (natural armor)
Hit Points: 50
Speed: 40 ft.; swim 40 ft.

Initiative
-> Omeros & Kadmos
Serpent2
Aurora
Serpent1
Kelnes & Isaiah & Chironides

Important Battle Notes
Captain is at the help, and crew mates are running around doing their job and will go below deck if they can.
Monster is currently fully underwater. It cannot be seen at this time.

Kadmos - concentration on heroism (self)

Enemy Damage Taken
Serpent 1: 34
Serpent 2: 159 (staggered)

Battle Map

As a bonus action, you give yourself advantage on your next attack roll on the current turn. You can use this bonus action only if you haven't moved during this turn, and after you use the bonus action, your speed is 0 until the end of the current turn.

DMG
p258
Adventuring gear, poison (injury)
1,200 gp

This poison must be harvested from a dead or incapacitated wyvern. A creature subjected to this poison must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.