When you watch Supernatural Season 13 Episode 13 online you'll see how far one angel will go to get what they want. Lucifer is on the search to find grace so he can heal, and he learns of a woman named Sister Jo who can instantly heal people. Lucifer is able to figure out, rather quickly, she is an angel, and he heads to find her. Once he gets to the town she is in, she stops him before he takes all of her grace. She strikes a deal with him, if he keeps her alive he can feed off her grace every once in a while, but she gets something in return. Lucifer agrees, and they bond. Jo eventually brings Lucifer to meet with some other angels, and he convinces them he can help them get more angels, but they have to give him complete powers. The angels eventually agree to the terms, and Lucifer is welcomed back in heaven where he takes complete control. Meanwhile, the guys are on the hunt to find a way into the other world, and they enlist the help of Donatello. They have him try to read the demon tablet in hopes of finding a door to the other world. Want to see what happens next? Go watch Supernatural online now via TV Fanatic.