Bonesaw- Pagoda Failsafe

Amy used her power on Pagoda, felt his body, much the same as Murder Rat’s in so many respects, though the metal frame with the needles in his spine was different.  She reached for the ligaments at his shoulders and hips, separated them.

The first had grown back before she’d started on the third.

“He heals,” Bonesaw informed her.  “Two regenerators in one.  There’s only one good way to stop him.  Try again.”
...

Sending signals to his arms to get him to move.  No.  The metal frame overrode anything she could do with her power to control him.

“Three.”

Amy used the only option available to her.  She disconnected him from the metal frame that Bonesaw used to control her subjects.  She could sense it as the metal shifted into motion around his heart.  Not needles, as there had been for Murder Rat, but small canisters of fluid.

“Two… one… zero point five… Ah, there we go.”

Pagoda lurched backward and broke contact with Amy, her power no longer giving her an insight into what was happening with him.  He sat down, using one hand to prop himself up.  A moment later he slumped over, his eyes shutting.  His breathing stopped.

“A chemical trigger for something I already put in his DNA, when I was patching his regeneration abilities together.  Reverses the regeneration so it does the opposite, starting with the heart.”

Amy looked at her hand.  She’d just taken a life.  A mercy, most probably, but she’d killed.  Something she had promised herself she would never do.

- Worm, Interlude 11.h