The next horrors the Winchester hunters face involve a nice-looking, "hot" as Dean described, sinister nun on the loose. The upcoming episode of "Supernatural" titled "Paint It Black" brings Sam and Dean to church and will ultimately compel them to look for evil in the most unlikely place or individual, for this matter.

The brothers have to get to the bottom of the mystery of the chain of horrid suicides all done by slow, self-administered disembowelment. Interestingly, the people who apparently killed themselves are members of a Catholic church who also happen to have given confession recently.

This led Dean and Sam to believe that the priest administering the confessions is doing all the grisly work. In order to capture him red-handed, Dean himself went into the confession booth to see how it all works.

However, the promotional video for the episode lets the priest off the hook and suggests that the sister exploited her sweet veneer to cover her killing spree. Whatever her reason behind her crimes, there's no telling but it is almost sure that there is a monster beneath that pretty face.

On the other hand, Crowley captures Olivette, the leader of the Grand Coven after he misleadingly summoned her to his place. "Paint It Black" also continues Rowena's struggle to get back to Grand Coven to practice her magic to all comers again.

Rowena, who fans saw first in "Soul Survivor," was casted out from Grand Coven after her magic was reckoned to be too extreme. If her desire to use magic again is granted (that is if Olivette approves), fans already foresee trouble for the Sam and Dean, Crowley and even for the whole of Grand Coven. The powerful witch is undeniably a force to be reckoned with.

"Supernatural" season 10 episode 16 titled "Paint It Black" will air on Wednesday, Mar. 25.