if i have vex apathetic at a battlefield does its ability refer to the enemy unit’s standard move, or does it also apply to the enemy using a card like ride the wind to move the unit? Also can I choose to charm the enemy unit?

Vex, Apathetic's ability applies to both Standard Moves and moves caused by card effects like Ride the Wind.

Here is the breakdown of your questions based on the game rules and provided FAQs:

1. Does Vex's ability apply to moves like Ride the Wind?

Yes. When an opponent plays a unit while Vex, Apathetic is at a battlefield, its ability triggers, [Stuns] the unit, and applies a restriction: "They [the opponent] can't move it this turn."

This movement restriction is absolute for that turn. It does not distinguish between a Standard Move and a move granted by a spell or ability. As per the FAQ for Vex, Apathetic, the effect programmatically selects the unit played, and that unit is restricted from moving by any means for the remainder of the turn.

2. Can I choose to Charm the enemy unit?

Yes, you can target the unit with Charm.

• Targeting: Charm is an [Action] spell that moves an enemy unit. It does not have a targeting restriction that prevents you from choosing a stunned unit.
• Vex's Interaction: While Vex's ability prevents the opponent (the controller of the stunned unit) from moving it, it does not prevent you (the opponent of the unit's controller) from moving that unit using your own card effects like Charm. The restriction explicitly states "They [the opponent] can't move it," which refers to the player who owns/controls the unit, not the player using an effect to move their opponent's unit.

Summary: Vex will effectively lock that specific unit in place for the opponent, but you remain free to use cards like Charm to move their unit to a location of your choice.