Game mechanically, the only thing missing from the "Morgan nuked a Naagolshii" bit is that Morgan nuked a Naagolshii. If it didn't have PI up (or if a nuke satisfies it's catch), and Morgan, by trickery and modern knowledge it lacked, blindsided it with a nuke (a holy pile of manauvers, assessments and declarations), all it really says is that the nuke had a relatively high weapon rating and enough circumstantial modifiers to make it a better weapon than Morgan's personal nova potential (not being magic being WAY up there on the list, against a Naagolshii)