Does damage clear from units after using Snapvine or Challenge ability (before end of combat/turn)?

Ruling: Damage does not clear after Snapvine or Challenge resolves. Damage only clears after a full combat or at end of turn. Units dealing damage to each other through Challenge or Snapvine is not considered combat.

Nuances:

• In the example scenario, a unit that takes 2 damage from Challenge will still have that damage when it fights in the subsequent showdown, potentially causing it to die
• Voidgate battlefield does not interact with Challenge or Snapvine damage