Makes "dodge chainblade yada yada" challenge veeeery easy! so, to complete it "veeeery easy" way do this:
after the chain blade comes to the arena then he starts running at u then swings with those blades, dodge the bladeswingythingy attack then run behind him! run run run to the arenas edge (there is a black/gray line with some orange lines)go to the (black/grey) edge then the chainblade should only dance around and that way! just stand those 2 minutes on the (black/grey) edge and 3, 2, 1, 'voila!I've tried it and succeeded with dat!