The x-ray is my 100th unique mutant monster entry (which really comes out to about 105-ish critters, if you include those with sub-types (like molebears/polar molebears and groatches, both domestic and wild), and with that letter X, I filled all the slots on my "Alphabet of the Apocalypse". Yep, I've got entries covering every letter A to Z...from the reclusive aarborvarks to the tempestuous zephrogs.
Much love to all
The Mutant Future Core Rules have about 150 creatures listed. Given the stuff in the pipeline, I can easily beat that number.
Thanks for reading.