This is a pretty cool idea. I think it's neat.
I don't think the concept as a whole is too implausible, as long as the physiological changes aren't too outlandish. It's a nice way to utilize the varied skin colours, though. I can imagine dark blue, dark green, brown, or the dark gray skin colours would lend itself well to camouflaging against underwater foliage or a riverbed or such. Streamlined horns would make sense. That big thick tail for Au Ra could be seen as the wide tail used for swimming. You could also throw something in about wider feet and hands and larger lung capacity as well.
The glowing horns bit I think is probably a bit much, though. An alchemical mixture applied like an ointment to the horns might work, although even then it's impractical unless the horns are forward facing or conveniently act like a flashlight. Otherwise, I don't see why you wouldn't be able to run with this.
I don't think the concept as a whole is too implausible, as long as the physiological changes aren't too outlandish. It's a nice way to utilize the varied skin colours, though. I can imagine dark blue, dark green, brown, or the dark gray skin colours would lend itself well to camouflaging against underwater foliage or a riverbed or such. Streamlined horns would make sense. That big thick tail for Au Ra could be seen as the wide tail used for swimming. You could also throw something in about wider feet and hands and larger lung capacity as well.
The glowing horns bit I think is probably a bit much, though. An alchemical mixture applied like an ointment to the horns might work, although even then it's impractical unless the horns are forward facing or conveniently act like a flashlight. Otherwise, I don't see why you wouldn't be able to run with this.
