Got to be careful about that Fellowship wording. Are cards under the Fellowship token put back into your deck at the end of the game? This matters for cards like Gardens.
Ark of the Covenant -- potential balancing issue in that its power fluctuates quite a bit depending on whether there are any Fellowship cards in the kingdom. Granted, Potion cards are similar in that they are better the more of them you have in the kingdom.
Bronze Serpent -- is that supposed to be +$2? Your reaction is poorly phrased. Do you have to reveal the Bronze Serpent to use the reaction? If so, say so. But that would be broken, because you can reveal the same reaction multiple times. You would have to have it be discarded or set aside (so, just like Horse Traders).
David's Sling -- If David's Sling is in the kingdom, people might want to stay away from attacks in general, and that in turn means people will have no reason to get the Sling itself. So it kind of just eliminates choice in the kingdom. Thankful, this card is actually pretty weak, so it would be avoided either way. Why go to the trouble of attempting to Sling away the opponent's Witch when you can just buy Witch yourself?
Dead Sea -- Ridiculously overpowered. Like, insanely over-the-top powerful. Trashing any 3 cards in your deck AND the soon-to-be-useless trasher itself? Without wrecking your current turn? So, so, so OP.
Endor Witch -- You cannot just assume that people will reveal their hands. You have to actually say, "or reveal a hand with no Fellowship cards". So you probably want to rephrase it as, "Each other player discards a Fellowship card from his hand or gains a Curse".
In most cases, this is a $4 Curser. Many kingdoms won't have Fellowship cards, and even in those that do, players will be unlikely to have one in their hand when Endor Witch is played. The question then is, how does this compare to Sea Hag and Young Witch? I think EW is more powerful.
Goliath -- Overpowered. With Goliath in the kingdom, the only viable strategy will be pure money, because players can freely spam Goliath. Against that onslaught, players will have to trash actions or discard everything until they have no hand at all.
Now, I get that you are trying for theme here. Goliath is super strong, but David's Sling counters it. Flavourful! Except that a Goliath strategy will still crush a David's Sling strategy, because DS is useless if you are forced to trash or discard it when the Goliath player plays 3-4 of them.
And of course, most kingdoms with Goliath in it would not have David's Sling in it anyway. And again, even if you had a DS in your deck, that doesn't mean you'll draw it at the right time.
Jericho March -- As worded, a Jericho March will stay in play forever, continually gaining Gold for you every two turns. This is because it always does something next turn (rotation) so it is never cleaned up.
Jordan River -- Sounds overpowered at first but probably not as good as Courtyard, so it is probably fine!
Joshua & Caleb -- +2 Cards, +2 Actions is very powerful, but you also give a big benefit to the other players. It might be fine. Hard to judge.
Manna -- Also hard to judge. Sounds alright.
Menorah -- Mostly for use with Provinces, I guess? Seems a bit weak to me.
Miriam's Dance -- I suppose the +$1 is a one-time thing? This looks OK, except that it must cost at least $4 because it is strictly better than Village. $4 would be a fine price for it. It would be an interesting Village/Peddler variant.
Moses' Staff -- You keep omitting the plus sign for virtual coin... and that in turn makes it difficult to tell if this is supposed to be generating VP on play or if it is just worth 2VP. I assume the latter, because it has the Victory type. But then the virtual coin is misplaced; it should be "+$1" as part of the action.
Anyway, you should really give this a Fellowship type because it is strictly inferior to Harem in kingdoms with no cursing nor fellowship cards.
Mt. Sinai -- Freely gaining cards directly into your hand is just asking for some broken combo to appear. The only official cards that gain directly to your hand will only give you treasures (e.g. Explorer) or Curses (e.g. Torturer). That said, I can't think of a broken combo off the top of my head, so maybe it's alright.
Passover Meal -- Barring some edge cases, this is strictly inferior to Market. It should cost less than $5. I would probably start testing it at $3.
Pharoah's Army -- You have to be really, really careful about cantrip attacks. They really have to be weak and/or non-stackable. Existing cantrip attacks are Spy, Urchin and Scrying Pool, all of which are pretty weak attacks that don't stack well. I suppose there is also a cantrip Knight, as well as a +actions Knight. Pharoah's Army is not a cantrip, but it is non-terminal. Care still must be taken. PA gives coin, which is by no means weak. It is a Festival that replaces the +Buy with an attack. The attack is actually pretty swingy. You could reveal a Copper or Estate, helping the opponent. Or you might reveal Province after Province, loading them with Curses.
Overall, tough to judge. Take care with this one.
Pillar of Fire -- I am not a fan of +$3 on a $5 action, but that's just me and I don't have a good reason for it. This is probably fine.
Scapegoat -- Probably OK. I'd start testing at $2 though; it looks quite weak to me.
Shofar -- And what if there are no attack cards in the kingdom? This card becomes useless.
Star of David -- Usually weaker than Great Hall. I guess the Fellowship type helps it.
Stone Tablets -- This should probably cost $5. Yeah, you end up with a 3 card hand, but it is the best 3 out of 9. That's huge! And you still have an action left. Increasing the reach of Warehouse like that makes it way better.
Tabernacle -- The wording is off. You mean for it to be, "When you play this". It is probably OK. Not sure how powerful the Fellowship gaining is.
Tithe Barn -- The 1VP feels totally tacked on. Since it is a treasure, it should say, "When you play this".
Walls of Zion -- At first glance, this card is severely lacking in synergy. It is a village that rewards you for not having actions in hand... by making it less likely for you to pair it with actions in the future! But you could use it for a powerful money-based strategy. Spam WoZ to flood your deck with Silver. On the turn you play it, WoZ is basically Grand Market if you keep your action density low. Test this card carefully as well.
