I’ve read comments that this scenario happens when the final opponent concedes during the previous Tavern phase
You can tell you're fighting the ghost if the name in the top left says "Kel'Thuzad". If it says your opponents name and shows KT's picture then they conceded or killed themselves with a self damage effect.
syah_hs
You can tell you're fighting the ghost if the name in the top left says "Kel'Thuzad". If it says your opponents name and shows KT's picture then they conceded or killed themselves with a self damage effect.