First, your theory that the Enodia rift is slowing down mutations. I've been looking into what makes our rift unique, and I'll admit, we have disappointingly few concrete answers after five years of study.

My best lead: the February pulse and the June storm are events that had never-before-seen effects, and both registered a secondary source of radiation different from the standard radiation from the rift. At first I thought this was a short-lived phenomena exclusive to massive events like the pulse and the storm. But... that same type of radiation is emitting from Ernestine.