So yeah, Hosts of Mordor is actually focused on two main themes -- Graveyard and Spellslinger -- which is standard for basically all precons
These two abilities actually work really well together, as the mana ability will give you the necessary resources to play the three cards you just exiled off the top of your library
Additionally, it's upgradable, allowing players to strengthen their army and refine their tactics as they progress, making it a deck that grows alongside its user
Few decks can really use it, but when you can, its literally better than the original five Moxes
However, if you do go heavy into Good and have cards like Gold Dragon, it is possible to hit that threshold
But you neednt break the bank searching for Eldraines rarest in order for your decks to perform at their peak