Since apparently not well enough described Pale blood is a special ability that acts like a passive ability. For people who know Bloodborne lore i am sure you can guess what it is from. Anyway the stat bonuses are a permanently active as long as you have the ability. Now I know it is not canon nor lore wise but it is also why during the arc we can interact with messengers as without the blood we are outsiders of the dimension and the blood acts as a form of anchor. It is more of a special bit since this is a cross over. Also some interesting lore tidbit I am going at this from a certain lore Perspective based around the Moon presence and the Doll. To put it simply the Anchor which much like in Awesomepocalypse was a form of crystal, is interfering with the dream and nightmare planes. Both want it removed for certain reasons.