Cygnus! Hyogen no senshi - S1-E3
Plot hole: The tide of the fight turns when Hyoga revealed that he was never affected by Hydra's poison because nothing can break the defenses of his Cloth. But the claws DO make huge holes, that are then nowhere to be seen by the end of the episode, and yet, a plot point from later in the series, Cloths do not have self repairing abilities - not at that time of the series at least.