Does the Black Knight have a random phase 3? The first time I got to him I made it through phase 1 and 2 pretty easily (paladins!!), then in phase 3 something happened and I was staring at a graveyard.

Tried it again last night and downed him without issue. The only thing I noticed was that in phase 3 he changed into a ghost form or something. I don't remember him doing that the last time I tried him.