When NAP plays Zenith Blade in response to AP moving to an open battlefield, does NAP score a point for gaining the battlefield and then another point at start of their next turn for holding it?

Ruling: Yes, NAP scores a point for conquering the battlefield (subject to normal conquer limitations) and will score another point at the start of their next turn for holding it.

Sequence:

• AP moves to an open battlefield and applies contested status
• AP passes priority without starting a chain
• NAP plays Zenith Blade, applying stunned status to the attacker and moving a unit to become the defender
• If the stunned attacker cannot kill the defender, it is moved back to base during cleanup
• NAP scores a point for conquering (if eligible)
• At the start of NAP's next turn, they score for holding the battlefield

Nuances:

• NAP does not score if they already controlled the battlefield before combat started
• NAP does not score if they already scored that battlefield this turn
• Scoring this way counts as a conquer, so it has all conquer limitations and triggers
• NAP cannot win the final point this way unless they've scored all battlefields
• There is no final point limitation on holding, only on conquering