OCC: Combat is indeed over. Only "weakness" I see for a zombie is staggered, but then everyone knows that without a check. Channeling does either or, you chose to heal the living or harm the undead not both at once.
Daggal steps into Hagnim's spot and brings his mace down hard to end the creatures un-life. The battle is over in mere seconds and the group hardly worked up a sweat.
As the noise of battle subsides the group looks around at the bodies of the fallen. It is good that the group was present to see some of the zombies emerge from their graves as it let's them know this wasn't some necromancer or Whispering Way plot.
What is bad about being here and seeing this it means something far more sinister is at work. Something has reached through the void to stir the dead to waking. Some malice has reached out and is making them restless.