if SS has the Sage's eye out, then the drop of blood is definitely there. I feel like the Sage will definitely try to intervene for his obsession. Sage ex machina, if you will.
feel like whenever SS gets spirit stones, he very shortly thereafter runs into a situation where they must all be used in a hurry. if they are spirit stones, then they shan't be around for long.
Ch 1919 As long as you live long enough, you can have anything you want