(Grand Forks, B.C.)
Echeveria, like all plants, can mutate. Sometimes this creates yet another gorgeous rosette forming succulent, other times something more sinister looking.
This fasciation as it's called, is simply one way that these mutations appear, and they can form a brand new kind of plant. These are called 'cristate' or 'monstrose' versions. In time, the normal parts of these plants can just crowd out the monstrose parts, so it's important to cut those off, as they're much more vigorous.
These monstrose or cristate plants are genetically identical to the normal versions, with just this expression of different tissue. In most cases, it's not caused by a virus, the most common reason for the different tissue to emerge.
Enjoy your monster!