The idea is that the speed is a pretty severe limitation-growing something like an extra arm-sized appendage would take several minutes if he did it [i]fast[/i]. I understand, though, and have ideas for a handful of other issues.


First, the relative slowness of his ability makes him extremely susceptible to any form of ambush. It generally takes a long time for his adaptable abilities to morph to react to or counter an assailant.

Second, when he notably increases the speed and especially when he quickly goes through multiple transmutations, this also increases the rate of replicated cells and results in cancer and thus produce virtually any kind malady such as nausea, pain, tumors, spilled acids eating away at flesh and so on. While he can always heal this, that requires time-often significant time-at minimum several minutes and up to much longer depending on the size and complexity of the mutations.

Third, any abilities with particularly 'chaotic' effects-mind abilities that cause confusion or distorted perception, elemental abilities that can cause any sort of biological misfiring rather than just destruction (electric abilities being a common example) can easily trigger mutations in his extremely malleable nervous system or cause him to run wild in a maligned mental state.


Aside from that, what of the background bit I mentioned? He need not actually [i]be[/i] 'perfect' at all-just the result of a science project aiming to create such is what I want.