The most ruthless Shredder?

[The Great Saiyaman]

Originally Posted by newfan

Oh, I just thought Shredder was trying to change her back (as he had previously asked the Kraang to do) but given the unique mutation that was the best Baxter could do. Could be wrong ofc, just never suspected her remaining part snake was intentional on Shredders part.

It wasn't, that was a result of the chemicals that Stockman spilled into the mutagen. Look up the episode, after Karai escapes Stockman's lab, it is revealed that she can change back but not 100%.

But the pain that's involved with that transformation is the reason why Karai only uses her full snake form as a last resort.