Just encountered invisible azlar in def team bug in var.
Def team was consist from Mother North - Shadereave - Zulag - Guin - Azlar.
I killed Azlar under Shadereave buff. He awoke as Draugr. I killed him again and in same turn MN fired. Azlar was resurrected as invisible original, and cannot able to target via my Magni + Lepus, but can strike well.
After my defeat he was in full health (because other MN heals affected invisible him).
In my raid tournament attack I killed all 5 of their heroes, however the battle was not over. I had to take another 15 or so matches before the victory was given. I believe this was a bug with Shadereave. He went off and I then killed all the heroes. They came back correctly, but when I killed the last one again is when the bug occurred. There were no heroes on the screen but the game thought the right wing was still alive. I took no damage but had to keep making matches/using specials. Fortunately it did eventually recognize the victory.