You can improve Bloodline Limit’s ability by attaching bloodsouls, but there’s a level limitation on attaching bloodsoul. Once attached, bloodsoul can be cleared or taken down by Soulsplit Blade. After clearing, the bloodsoul will vanish.
You can discover free bloodsoul for some times every day and can also choose to pay to discover bloodsoul. Between 2 discoveries is the cooldown.
There are many types of bloodsoul with different stats. You can get a different type of bloodsoul in the same level by refining.
3 identical bloodsouls can be synthesized into a higher level one of the same type. If one of the three bloodsouls is different from the others, it’ll randomly synthesize a higher level bloodsoul.