After going back to the bar, Sam and Sierra ended up finding Father Gil and talking to him. He eventually said he knew where Casey might be and offered to take them both there since he seemingly cared about her... maybe a little too much. Sam was desperate to find his brother and Sierra really wanted to kick Casey's ass for spiking her.
Then after a boring conversation that Sierra blanked out in the car due to her rage about not being able to use her abilities, but also annoyance for not realising sooner, Father Gil's station wagon pulls up in front of Casey's other home. The three of them got out the car and approached the large house.
"Dean?!" Sam yelled, cupping his hands around his mouth. There was no response, even after Sierra banged on the front door a bunch of times. Sam pointed to the other direction, "Check that way." He told Gil, then he and Sierra walked into the other direction.
"Sam! Sierra?" Dean called from a grate in the ground, appearing the be in the basement.
"Dean!" Sierra shouted, following his voice.
"Sierra, down here!" Dean yelled again, "The basement caved in!"
"Hold on, okay? We're coming." Sam nodded back, gesturing over to Gil, who Dean couldn't see.
"Who else is there?" Dean questioned, hiding his worry.
"We're here with the Father."
Dean looked to the side, but Sierra and Sam didn't see at who. All she saw was the outline of a Devil's Trap, so they rightly assumed it to be Casey. "Sammy, Sierra, be careful."
Sam turned to see Gil going black-eyed, Sierra's eyes widened at the image. She let out a snarl at the demon she couldn't detect, clenching her fists together. She went to pounce, but a loud shot was fired just past the demon's head, which destroyed a statue.
They all whipped their head around to the side to see Bobby with the Colt, but Gil used his own powers to make Bobby fly into the wall. Sam yelled, darting forward, but he was also thrown into the windscreen of the car.
Whilst Gil did that, Sierra let out a rage-filled growl, charging at him. She let her claws extend and she managed to stab him a few times before he choked her with ease, considering the Devil's Shoestring substance hadn't left her system yet so she was weaker.
"Azazel was wrong about you. You're weak." Gil spat with black-eyes, lifting her up by the throat and shoving her back. Sierra landed against the broken statue, groaning in pain as Gil went down to the basement.
Sam got up after clutching his arm in pain, heading to Bobby, "Bobby, you alright? How did you know where we-"
"Go!" Bobby ordered, handing Sam the rebuilt Colt.
Sierra grunted in annoyance yet again, rubbing the back of her head whilst another figure stood in front of her. It was Ruby, who offered a helping hand to her. Sierra hesitated for a second, but took the blonde demon's hand and stood up onto her feet.
"It won't last long. You'll be fine." Ruby told her reassuringly, then gestured to Sam, "Go on now, pups."
"Thanks." Sierra muttered before following Sam down to the basement.
"You okay?" Sam worriedly asked. Sierra firmly nodded.
"I'm good. At least I can still heal." She breathed out, then looked at the Colt. "That working now?"
"Yeah, thanks to Bobby." He replied, holding the gun tightly in his hands whilst they raced down the steps. They saw the opening to the basement, which had been forcefully cleared of rocks by Gil earlier.

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HELLHOUND - Supernatural
RandomIN WHICH, an infamous 'demonic pitbull' shifter changes her ways for the better and continues to grip onto the final strings of her humanity, unlike other demons that want her dead. And somehow, ends up in the arms of a certain hunter, who overtime...