If that's true, it would be great
The possibility to have it as a standalone card makes decks without
possible and the high cost of 9
won't be a big problem either, because you would need to play and use an eternity anyway, or if you prefer rewind you still need that one more card.
As for the comparison of fractal and pharaoh... right now
seems to have a great synergy with
though
also has, so I see both options as valid. The mummy+eternity combo might be slower, so less suited to AI3/AI5 grinding, but might prove better against FG in stall decks... though it needs testing, and it might be a little too early to compare these cards as both might be changed before they appear in the real game.
Also the scarab+fractal deck has one weakness... if your opponent ties to stall (plays no creatures, a permafrost/jade shield/diamond shield) and a bunch of SoGs then plays some immortal creatures you are screwed...
and that stalling strategy is approximately what I planned at first with pharaoh
(I still have to try it more in trainer though)