[Vehicles] Living Vehicles?

[Johnny Angel]

I am starting to write a setting for an upcoming game (related to the mage blade thread).

I have started to think about what vehicles are available in the setting. One of the ideas I came up with is that some of the "vehicles" are actually animals which have been modified through some mixture of magic and bio-tech.

While living vehicles do exist, in terms of something like a horse, I have ideas in mind which are a mix of living thing and machine (or at least a heavily modified living thing).

The cylon raiders from Battlestar Gallactica might be a good example, but my version would be less computerized machine and more bio-tech/magi-tech machine. Another example would be the biomechanical whale pictured here, but (again) I visually imagine something which still appears more living.

Are there guidelines for building something like this? I was looking at Transports of Fantasy, but I'm not sure that quite covers my ideas.