This has made Sephiroth somehow even more desirable than before
They're a topic that generates a lot of impassioned discussion, mostly because every time they come up, everyone starts arguing about the affordability of Magic and how WotC makes the game too expensive to play. There is increasing acceptance of proxies in certain situations , especially provided you are not trying to use fake cards and pass them off as real or using them in tournaments where they're not allowed
There are many reasons to blight
Honestly, theres definitely worse things you can spend three mana on, especially if you have sacrifice outlets
Additionally, both cards are Storyborn, adding additional thematic ties
In a Two-Headed Giant game, Elesh Norn does not affect triggered abilities of permanents your teammate controls