Complex sentence: As the leader of the Killer7, Garcian alone has the ability to converse with Harman's alter egos; this is also true as the briefcase he carries is revealed during the game's conclusion to hold the various weapons of the Smith Syndicate.
Split into simpler sentences: As the leader of the Killer7, Garcian alone has the ability to converse with Harman's alter egos. Garcian carries a briefcase, which is revealed at the end to hold the various weapons of the Smith Syndicate.