If I hold and score a battlefield on my turn, then leave it, and my opponent conquers it during a showdown, can I score it again (and trigger conquer effects) if I move back to that battlefield later in the same turn?

Ruling: No, you cannot score a battlefield more than once per turn. If you have already held or conquered a battlefield this turn, you cannot score it again by either method during the same turn.

Sequence:

• You hold and score the battlefield on your turn
• You leave the battlefield
• Opponent conquers it during a showdown
• You move back to the battlefield
• You cannot score again because you already scored it this turn

Nuances:

• Conquer triggers will not occur because scoring is a prerequisite for conquering, and you cannot score the battlefield again
• This restriction applies regardless of whether your first score was from holding or conquering