As the molten Aaron bubbled away in the cauldron, the Caretaker took a thorny bundle of brambles twisted together to form a horrific looking bouquet garni and stirred the pot with it. The bundle of brambles slowly dissolved into the wax as a thick vapour started to form. Aaron was screaming mentally, it was as if the thorny vines were all over him stabbing his viscous mass with a million needles.
"You didn't stop them before but you will block their escape!" he growled, raising his hands the vapour dispersed moving outwards faster than a bullet and passing the Impala.
"Whoa!" The brothers yelled in unison.
Adam stuck his head out of the window "What the hell was that?"
Sam pulled his brother back in "looks like the guy hasn't finished with us!" and looked ahead where the wall of vapour had stopped and coalesced, weaving and wrapping around the trees that were within the wall of vapour. Vicious thorns burst out of the vines while the vines continued to grow out.
Dean got out of the car grabbing his faithful shotgun and shot a shell into the still forming mass.
The shell impacted the wall with a blood curdling scream of pain from the thorny mass that was Aaron, leaving a sizeable cavity which very quickly closed up as more vines grew into the cavity. He reloaded and fired again, but the cavity just filled up even faster.
Dean kicked the nearest tree in frustration. "The bastard's messing with us!"
Meanwhile, the Caretaker walked down to his workshop which was left virtually unscathed in the huge flash of whatever reversed the enchantments he had set up in the museum. Pulling open a drawer of the table upon which Dean had laid paralysed, he withdrew a vial of pearlescent milky fluid labelled Dean. He then did the same thing approaching the table where Sam's body had laid.
"A part of you boys is still with me!" he muttered and started to utter an incantation while holding out the vials. They began to take on a faint glow.
He searched his museum for suitable waxen figures to which he could infuse his essence of the brothers and as he trudged around the infinite hallways of his impossible museum he settled within the natural history wing. An evil grin slid across the Caretaker's haggard face as his gaze fell upon a certain exhibit...