The whims of latent arcana can be fickle, oft reflecting the acts within the material realm around which they swirl. It is a result of this that most magical research and development happens to be located far away from population centres, with a slight side effect that arcane hyper-fixation may result. In this case, it happened to be after one rather especially intensive material investigation into the arcane properties of latex that, in the aftermath of a thaumic excursion, what was previously a mass of inert polymer was found not merely liquified, but drawing itself into a viscously equine form.

While the precise nature of the experiments being undertaken at the time hasn't been released, conclusions can be drawn given the lascivious intent behind the curvature of the gleaming latex form, and subsequent interactions with on site personnel. Pitch Drip, as the being chose to identify herself, was clearly wrought from the deeper layers of the equine subconscious, acts commonly confined to after darkness, with all the associated visage to accompany such.

As a being whose composition entirely exists of arcanely influenced rubber, combined with a nature tending towards an especially perverse mindset, Pitch Drip is considered a sufficient risk to personnel that she is to be kept contained to research and development facilities.