Ah no in that vid only he only do the rather common dark magic move where it like rain from the sky. That seem to be a pretty weak one that barely ever hit or hurt anyone much. Might be it just have very bad accuracy. He have at least two other dark magic moves that's much worse. In one he send several waves of dark magic away from him in like a cone form toward some player. Just stand and take it ...

Was standing outside Father of the Abyss boss last night and saw even more fails than at the dragon. Several times I've seen hosts just die from his opening moves. Fight over before phantoms even reach the arena. :p
Also saw a really nasty move from the boss that I think we did not encounter. He like shoot out balls of black magic in the air all around him who then return and hit you in the back ...

Hello. Wariyaka here :)
I really liked the dlc but as said earlier it really is a bit short for the price-tag. The 3 "storyline" bosses was pretty straight forward and offered no really problems but it seem like A LOT of players have problems with the dragon for some reason. Like 4 out of 5 times I'm summoned for it it end in fail and half the time the 2nd phantom dies too. He shouldn't cause that ...