Heheh here's an attempt at Leech TF, I sorta got the effect I wanted but it could've gone better, oh well. XD

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I woke up with my arms and legs tied up, I was in a dim room lying down on the cement floor, I felt a feeling of discomfort, when I looked at my surrounding I began to panic, Huge leeches everywhere! They looked so disgusting, I shuddered when I saw quite a few of them latched on my body, the sounds of slight squeaks as they sucked on me, no wonder I felt so drained! I struggled the best I could to get them off but it didn't work, I began to feel more and more weak.

- A little while later -

I've lost the motivation to struggle, I feel that my body has gotten quite swollen, almost as though I had an allergy to the bites, and I probably wasn't too far off, my fur had begun to fall out, I thought I was just losing life so fast that my fur rapidly thinned out but I was way off...

- Later -

I've been here for awhile now, my lower body had been swelling into a large black mass, my legs had fused and trough swelling the ropes holding my legs had busted off, the shiny black skin kept spreading, swelling up my body more and more as it covered me slowly. I began to get hungry, I curled up allowing the leeches to continue their job, they fed off my blood but gave me something else, they were the source of these changes.

- Much Later -

I was a big black shiny lump, or so it seems, I had become a king sized leech, with a series of stripes going down my back, not that I could see it, when my head got absorbed in the shiny blob that had become my body I lost my eyesight and hearing, all I really kept was a strange mouth that could serve well in sucking my victims dry. I'm a king-leech~

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The scientists we're right, the large leeches had a radioactive effect to them and it was alarming to see what they could do to other creatures. The scientists hope that they can retrieve the bat's original form, and that he won't get to hurt anyone in his state, the scientists hope that the bat is still in there somewhere.