Medium beast, unaligned
Armor Class: 8 +Prof mod + YOUR cha mod
Hit Points: d10 multiplied by specific amount
Speed:
, swim: 39 ft
Saving Throws: Wisdom, Constitution, Dexterity
Skills: Shares all the same proficiencies that you do.
Senses: Darkvision 120ft
Languages: Whatever the Archfey warlock understands
Advantage on all underwater abilities.
Actions
Binding Strike: Cha mod to hit. 1d6 + Cha mod + prof mod. Target is grappled (escape DC is your DC). Until grapple ends, beast can't use on another target.
Only good in water, but also the only real option for water. :can be dopphin or shark or octopus etc.