The answer lies in scarcity, both in the form of the products themselves and the rare drop bonus card, Encore Electromancer, a variant of Conclusion Reflecting on the overall delivery, availability, and concept of these cards, I feel this idea has fizzled out rather quickly and ineffectively
But that would not get it into A tier on its own
Its that the card, adorned on the back with the Japanese logo and the games name, doesnt actually do anything
I think of my situation with Narset and board wipes as very specific to my playgroup, so I haven't gone too far out of my way to "spread the good word" about them
With Niv-Mizzet, Visionary, it does an impeccable Ancestral Recall impression
That sort of flexibility in pushing damage is very hard for some decks to answer