The rag was held so hard against Beast Boy's mouth it seemed his attacker intended to break his jaw. The taste of bleach flooded his mouth, cutting off his consciousness.
He woke up in chains. When he shapeshifted, the manacles shrunk and grew to accommodate his new form.
"Soto, this wasn't funny the first time around!"
"I'm afraid you've mistaken me for someone else, Garfield"
His stomach clenched and beads of sweat dotted his forehead.
"Sl…Slade?"
"You never were the perceptive one", was his dry reply before materializing.
Beast Boy transformed into a tiger and leapt at his captor, his claws an agonizingly few inches from Slade's mask. Slade laughed before a metal staff appeared in his hand and cracked across Beast Boy's skull.
He held his throbbing head and glared at Slade.
"So, what, am I some hostage? You must really be running out of ideas if you think…"
"You're much too useful to simply be used as a bargaining chip"
His eyes widened.
"You're too slow-witted and unfocused to be my apprentice. I saw what happened to you and Adonis when exposed to that drug. I have a need of…a lapdog and there is no one better suited to this task than you."
Before he could react Slade's fingers bit into his arm and crushed it against the floor. A syringe tore into his arm and the clear fluid inside emptied itself into him.
Energy surged through his body like an electric current. His muscles swelled and bulged, and his felt his canines lengthen.
"Ho…how?", Beast Boy growled before the Beast took control.
"Don't you see, Garfield? You weren't vaccinated against my modified version of the drug"
The Beast howled and the floor shook when he tried to tear out of his chains.