Can Warwick with Flurry of Blades attack one battlefield, use his trigger to kill everything, then use Ride the Wind to move to the opponent's other battlefield and trigger again to clear that battlefield too?

Ruling: No, this combo will not work to clear both battlefields. When the first combat ends, damage is cleared at all locations, so the second battlefield's units will heal before Warwick can trigger there.

Sequence:

• Warwick attacks the first battlefield with Flurry of Blades
• Warwick's attack trigger resolves during showdown, killing units at that battlefield
• The first combat must fully resolve and end
• When combat ends, all units at all locations heal
• Only after the first combat is complete can a second combat begin
• By the time Warwick moves to the second battlefield, those units have already healed

Nuances:

• If the opponent has units on only one battlefield and the other is empty, Warwick could conquer the empty battlefield without triggering combat (and thus no damage clearing), then move to attack the occupied battlefield
• There can only be one combat at a time, so the second combat must wait until the first is completely finished