Amphibious. The beast can breathe air and water. Primal Bond. You can add your Proficiency Bonus to any ability check or saving throw that the beast makes.
Binding Strike. Melee Weapon Attack: your Spell Attack Modifier to hit, reach 5 ft., one target. Hit: 1d6 + 2 + PB Bludgeoning or Piercing damage (your choice), and the target has the Grappled condition (escape DC equals your Spell Save DC). Until this grapple ends, the beastcan’t use this attack on another target.