If I score a hold and retreat my unit from the battlefield, does the battlefield remain mine? If I move a unit back in (like Kaisa), do I trigger conquer effects even though I can't score it again that turn?

Ruling: The battlefield stops being yours the moment you no longer have units there. You would not trigger conquer effects if you moved back in, because conquer effects only happen as part of the scoring process, and you already scored that battlefield once that turn.

Sequence:

• You score the hold with your unit
• You retreat the unit from the battlefield
• The battlefield immediately stops being yours
• If you move a unit back in (like Kaisa), you do not trigger conquer effects

Nuances:

• Scoring includes both holding and conquering
• Conquer effects only trigger during the scoring process, not when simply moving units onto a battlefield