One creature you can see within range must succeed on a Wis save of be Charmed for the duration. The target has Adv on the save if you or your allies are fighting it. Whenever the target takes dmg, it repeats the save — success ends the spell.

You have a telepathic link with the Charmed target while on the same plane. On your turn, you can use this link to issue commands to the target (no action required). The target does its best to obey on its turn. If no order is given, it acts and moves as it likes, focusing on protecting itself. You can command the target to take a Reaction but must take your own Reaction to do so.