V Rising

You can get it right after you make the "Perfect Test Subject" trophy, where you need to feed it gruel to bring the blood quality to 100%, just after that select "bloody potion" or "bloody merlot" in the prison cell (just watch the prisoner's health and don't kill him), as soon as the bottle is ready, take it from the cell (at the bottom of the prison cell window there are cells from which we take the items) and drink the resulting bottle))