Mordor on the March is, dare I say it, the kind of fun spell that red seems to have a monopoly on
Its hard to say exactly what role and decks Emrakul, the Promised End will fill without actually playing such a strange new card, but a good starting point for comparison might be with Ulamog, the Ceaseless Hunger
You can flop 18 power and toughness onto the board for a mere 8 mana if you have three things you are happy to blow up
On the bright side, untapping Merieke with an effect like Magewrights Stone will get this job done without any issue
The counter transfer effect helps you keep pressure on the table even in the face of removal
But the books on Greek myths, for whatever reason, seemed to have a lot more illustrations than any of the others