Complex sentence: In battle, he uses two katanas anad utilizes shadow magic, to duplicate, phasing, and teleport himself, as his sword technique is also bit similar to that of Jin Kisaragi's sword technique.
Split into simpler sentences: In battle, he uses two katanas and utilizes shadow magic to duplicate, phase, and teleport himself. His sword technique is also a bit similar to that of Jin Kisaragi's sword technique.