We were interested in trying a cooperative deck builder, so we got Aeon's End--specifically Aeon's End: The New Age.
It's a fun game. Similar to Dominion, it has fixed supply piles. However, there isn't as much variation in kingdoms, because the power level needs to be balanced from game to game. Much of the variation seems to come from the choice of mage for each player, and the choice of nemesis.
The unusual thing about it is that you don't shuffle your deck. Instead you just turn it over. We were worried this would cause a lot of analysis paralysis, but in practice it feels like you're fairly restricted in your choices. Spells are discarded first, and then cards you bought, and then cards in play--and usually we just put the best cards first, to draw them sooner. As a consequence of non-shuffling, "missing the shuffle" isn't really a thing, and deck quality tends to be more uniform. There's probably some advanced strategy here but we're not at that level.
We were thinking we'd get some expansions, but
the expansions are shockingly difficult to navigate. As in, there isn't enough of a fan community to find decent and up to date recommendations, without reading at least a dozen independent reviews. Some of the expansions are "legacy" games, and I don't know what that means. The New Age had some legacy elements, in that new cards were revealed over the course of your first campaign. But we replay our board games extensively so I'm very leery of anything described as "legacy". I don't suppose anyone here has experience with Aeon's End and could comment on the expansions?