Alden Velaric

Magically Amphibious. The veteran can breathe both air and water. Once per day, the veteran can use an action to cast both Water Breathing and Water Walk. The spells must target the same ten creatures, and both have a duration of 1 hour.

Multiattack. The veteran makes two weapon attacks. It can replace one attack with A.) a use of Spellcasting to cast Conjure Barrage or Tidal Wave, or B.) its Breath Weapon, if available.

Wavemother's Reach. Melee or Ranged Weapon Attack: +8 to hit, reach 10 ft. or range 120 ft., Hit: 13 (2d8 + 4) Piercing damage, plus 18 (4d8) Cold damage. Hit or Miss: The trident returns to the veteran's hand immediately after a ranged attack.

Spellcasting. The veteran can cast the following spells from its trident, Wavemother's Reach, using Wisdom as its spellcasting ability (spell save DC 15, +7 to hit with spell attacks):

At Will: Conjure Barrage, Control Water, Tidal Wave, Wall of Water

2/Day Each: Conjure Volley, Cone of Cold, Lightning Bolt (level 5 version), Wall of Ice

1/Day Each: Chain Lightning, Otiluke's Freezing Sphere (level 8 version), Tsunami

Breath Weapon (Recharge 5–6). Dexterity Saving Throw: DC 15, each creature in a 30-foot Line that is 5 feet wide. Failure:  36 (8d8) Lightning damage. Success: Half damage.

Second Wind (Recharge 5-6). The veteran regains 32 (4d10 + 10) hit points and gains resistance to all damage types until the start of its next turn.

Storm Surge. The veteran casts Thunderous Smite or Lightning Arrow, using the same spellcasting ability as Spellcasting.

Interception. Trigger: A creature the veteran can see within 5 feet of itself takes damage from an attack while the veteran is holding a shield. Response: The damage of the attack is reduced by 14 (2d10 + 3). The attacker then takes lightning damage equal to the damage reduced.

Shield. The veteran casts Shield in response to that spell's trigger.