Just like all of the other cards on this list, Sephiroths abilities are a great way of bringing him to MTG in a way that befits his character
(The copy becomes a token.) The triggered ability Case of the Shifting Visage has when it's solved and the copy it creates will resolve before the spell that caused the ability to trigger
Having the guaranteed option to Blight each turn is useful, but having to apply -2/-2 each time to a creature isn't ideal unless you have a way of building creatures back up or excess life points to drain
I expect well see reprints of these cards soon enough, but even with a reprint I could see them do a Ghostly Prison and still stubbornly maintain a price above $5 due to the discovery effect where newer players who just started playing the game see their power and move to pick them up for Commander
Ultimately, however, the myriad of different art and foil variants in Phyrexia: All Will Be One, are simply too expensive to ignore
The Trumpeter Morph creates us X 1/1 Goblin Tokens for XXR once it is revealed