I think the previous chapter has a translation error.
In this version part of the vampire essence's passive was "Hp exponentially increase" but another translation said "increased health regeneration". Considering how he is fighting during this chapter i think the 2' is the correct passive.
I fear that Thorfinn will be forced to go back to his violent ways. Some people will be happy about that but it's basically like watching a former drug addict going back after he managed to clean himself.