When does damage heal in Riftbound, and if Warwick is played to base, then Flurry of Blades is cast, then Warwick attacks a battlefield, would all enemy units at that battlefield die?

Ruling: Yes, all enemy units at that battlefield would die. Units only heal damage after combat and at end of turn, so damage persists between these timing windows.

Sequence:

• Play Warwick to base
• Cast Flurry of Blades (damage is dealt to all units)
• Attack with Warwick to a battlefield
• Warwick's "when I attack" trigger can also be reacted to with Flurry of Blades for additional damage
• Damage from all sources accumulates until combat ends or turn ends

Nuances:

• The combo works regardless of whether damage is dealt in combat or outside of combat
• You can also cast Flurry of Blades in reaction to Warwick's attack trigger for additional effect