Complex sentence: Koshirou blocked Hyouma's sword strike with his scythe as Hyouma attempted to use his Dojutsu, but with his eyes destroyed from his fight with Gennosuke, Koshirou was completely immune to Hyouma's powers.
Split into simpler sentences: Koshirou blocked Hyouma's sword strike with his scythe as Hyouma attempted to use his Dojutsu. But with his eyes destroyed from his fight with Gennosuke, Koshirou was completely immune to Hyouma's powers.