The leather text Han Sen was reading said that the initiation of Blood-Pulse practice required a Blood-Pulse relic. If you obtained one, only then could you truly begin to learn the skill. Attempting to learn it before getting one of these relics would be a waste of time.
Han Sen searched for more and more information concerning the Blood-Legion and found a few topics pertaining to Blood-Legion relics. Unfortunately, no one else knew what they were, either. The only information that was available stated that the Blood-Legion relics were gifts given to humans by Blood-Gods. They were typically handed down through the generations by ardent family followers of the Blood-Legion. Outsiders were never privy to them, and not even low-level members of the cult could see them. They were reserved for high-ranking members of the Blood-Legion only.