On Supernatural Season 13 Epispode 12, Dean is put under a love spell by a woman named Jamie, and her sister Jenny, and they persuade him to hand over the black grimoire. While Dean is handing over the book Sam tries to stop him, but is too late, and the girls run off with the book. Thankfully, Rowena has been resurrected and is able to help the guys track down the black grimoire because she put a tracking spell on it.
It leads them to a town in Oklahoma, but the guys are not on board with having Rowena help them go retrieve the book. Rowena has her own plans, and puts a spell on the guys wheile she goes to retrieve the grimoire.
At the home of Jenny and Jamie are, the girls are bringing their mother back from the dead, but the spell goes terribly wrong causing their mom to come back as a zombie. Rowena's magic isn't able to stop the mom, but thankfully the guys show up to help fight. Sam and Dean are able to get the book but, but Sam let's Rowena take a specific page out of the book so she can perform a spell to protect herself even more.
Meanwhile, Lucifer and Castiel are currently being help in a couple cells in Hell. Lucfier quickly realizes his rage will get him out, and Castiel helps along with the plan. The guys are able to escape, but Castiel turns on Lucifer when he tries to get some of Castiel's grace.
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