Don't forget you can win the game as well - Craterhoof Behemoth (5), Pathbreaker Ibex (3), End-Raze Forerunners (7), Earthshaker Giant (6)
While Blood Moon is at its best in mono-red decks, we can construct our deck in such a way that Blood Moon hurts our opponents more than it hurts us
Export the card face so it prints well
Even then, it will get bought up by players who still need cards
The only downside for Zareth is if you want to use its second ability, you have to somehow get it into your hand, which can be done with ninjutsu cards like Prosperous Thief, trading them back and forth from your hand
On top of that, it also gives all of your Creatures +1/+1