Dominate Sea Creature

One creature with a Swim speed you can see within range must succeed on a Charisma saving throw or have the Charmed condition for the duration. Once an hour, it repeats the save, ending the spell on itself on a success.

You have a telepathic link with the Charmed target while the two of you are on the same plane of existence. On your turn, you can use this link to issue commands to the target (no action required), such as “Attack that creature,” “Move over there,” or “Fetch that object.” The target does its best to obey on its turn. If it completes an order and doesn’t receive further direction from you, it acts and moves as it likes, focusing on protecting itself.

You can command the target to take a Reaction (no action required).