If player A moves a unit into an open battlefield and player B uses Ride the Wind to move a unit into that battlefield, who is the attacker/defender?

Ruling: The attacker is the player who applied contested status to the battlefield. In this case, player A is the attacker and player B is the defender.

Sequence:

• Player A moves a unit into the open battlefield, applying contested status
• Player B activates Ride the Wind to move a unit into the same battlefield
• Player A is designated as the attacker because they applied the contested status first