Allies 2: Split Piles
Split piles are back! Only this time they rotate. Also they have four different cards in them. Let's see one to better talk about this. It's: Augurs.

So the pile starts with 4 copies of Herb Gatherer, then 4 copies of Acolyte, then 4 copies of Sorceress, then 4 copies of Sibyl. And you can only buy/gain the top card. But, the first card lets you "rotate" the pile. This puts all copies of whatever's on top onto the bottom. If the top has three Herb Gatherers and then Acolytes etc., rotating it puts all three Herb Gatherers on the bottom. If it was just one Herb Gatherer and then Acolytes, that one Herb Gatherer goes on the bottom. If the pile has different cards left in it, then rotating it will uncover a different one. It gets you through the pile.
So Herb Gatherer, it does this rotation trick, and Chancellors (what's that?), and also it gets a Treasure from your discard pile into play. Acolyte can turn stuff into Gold, but also can turn itself into whatever's on top of the Augurs pile - another Acolyte, or a better card (or hey, sometimes an Herb Gatherer). Sorceress is a guessing game, and if you're right you Curse the other players. And Sibyl lets you win that guessing game.
Here's another pile: Odysseys.

As before, the first card can rotate the pile. Old Map does a little filtering. Voyage is an extra turn with a tricky limitation: you only get to play 3 cards, and that includes Treasures. Although things that play cards other than from your hand get around this a little (e.g. Golem). Sunken Treasure can get you stuff you don't have yet, and Distant Shore is somehow a Lab that gains Estates.
What do the randomizers even look like for these? I'm glad you asked.

Split piles are a lot to process, so here's one normal pile too.

Cards turn into other cards and leap into the fray. Buy it even if you don't know what it will possibly do for you; you won't regret it. This can of course mess up the order of split piles.
To spice up the Liaisons from yesterday, here are two more Allies.

So that's an Armory and an Innovation.
As before, cards can be tried out almost immediately at
https://dominion.games/.