Hey just want to give you a heads up on the
Eater of the Dead + Phenax combo: it can create a poor gameplay experience when you're actually playing because:
1) It creates a situation where either someone has removal, or you just win after 1 turn, EXCEPT
2) The combo is non-deterministic. Because you don't know if you will hit creatures off of your opponents' decks, you literally need to play it out to the very end. Hopefully your opponents will get the idea and just scoop, but there might be one stubborn player who insists on going to the end in hopes that you run out of gas. This can take a long time, it is very sad when you fail, and it is not very satisfying when you succeed because you just spent like 5-10 minutes slowly milling all of your opponents with nothing else happening.
As long as you and your playgroup are okay with these two things you can totally go for it! I personally cut
Eater of the Dead from my own Phenax deck because I don't like either of these features, and also because I built mine to be a janky and very ironic sea-monsters tribal deck instead of a typical Phenax build so it was a little bit off flavor.