If an opponent conquers a battlefield and scores a point, then uses Charm to drag my unit into that battlefield, can I also score a conquering point on the same battlefield during my opponent's turn if I win the showdown?

Ruling: Yes, you can score a conquering point even though your opponent already scored from that battlefield this turn. You can score on your opponent's turn.

Sequence:

• Opponent conquers battlefield with 1 unit and scores a point
• Opponent uses Charm to drag your unit into that battlefield
• You become the attacker (since opponent controls the battlefield)
• If you win the showdown, you can score a conquering point

Nuances:

• Each player can score 1 point per battlefield per turn (not 1 point total between both players)
• The Charm target becomes the attacker because the opponent controls the battlefield