If an opponent would conquer a battlefield on your turn using Ride the Wind (via Promising Future), can they score the final point to win the game?

Ruling: To score the final point through conquer, you must have scored all other battlefields that turn. Since the opponent did not score any other battlefield on that turn (it was the active player's turn), they would draw a card from the conquer instead of winning.

Sequence:

• Players choose cards from Promising Future
• Cards are put onto the chain starting with the next player's card
• Chain resolves (non-permanents resolve in reverse order)
• Singularity would kill Darius before showdown starts
• Showdown cannot start while there is still a chain
• Even if the opponent moved Darius to the battlefield, they cannot score the final point

Nuances:

• The opponent cannot immediately conquer as soon as they move a unit to the battlefield if there is still a chain resolving
• Promising Future puts cards on the chain starting with the next player, so the active player's card would resolve last (after opponent's card)