Can Tryndamere's ability win the game at 6 points if you only conquer one battlefield (not both)?

Ruling: Yes, Tryndamere's "when I conquer" ability can win you the game at 6 points even if you only conquered one battlefield. Only the conquer point itself has the restriction requiring you to score on both battlefields.

Sequence:

  • You score the conquer point first
  • Then "when I conquer" abilities trigger

Nuances:

  • The restriction to score on both battlefields only applies to the conquer point, not to victory points gained from abilities that trigger when conquering
  • Both steps (gaining the conquer point and triggering abilities) are part of the same "Scoring" event