Your Carriage, my Master

We are at the end of the 8th century and this story is about an Alchemist who loves to play with death and life.
The Master's primary transport is a carriage driven by two modified creatures who can cross through this world to another one, in fact they have 3 eyes: one for the death world, one for the limbo world, and one for the living world.

To be honest, I set up this scene only to paint those creatures.