Does not work on either Azazel or half a black heart (needs investigation - Edit: Works with one black heart with ???, and will leave you with one full black heart and half a soul heart (the soul heart being used to fill half the remaining black heart)) - The reason it doesn't work with Azazel is that Scapular only really cares for Red Hearts, ??? is the exception since his Soul Hearts are his Red Hearts.
It seems that running in and out of a room to abuse the devil beggars or temperance machines does not work anymore. 151031