I love this card but it is significantly stronger in 2P than in 3P.
why?
Because the Ruins run out faster in 2P, because there's less of them in the pile and Reconstruction depletes the pile at the same rate regardless of player count.
However, I disagree and think it's equally balanced regardless of player count. City and Animal Fair don't do anything to help empty piles, and piles run out faster with higher player counts. Likewise, the fact that there are more players potentially using Reconstruction helps offset the bigger Ruins pile.
If only one person buys it, it's definitely much stronger in 2P, but if everyone buys a copy, it's not that much stronger, I don't think. In 2P, if both players buy one copy, it takes a total of 4 plays to deplete the Ruins pile (starts off with 10 cards, 2 are Exiled with buys, leaving eight), which would average out at 2 plays per player, in 3P, if all three players buy one copy, it takes a total of 9 plays ((20-3)/2 = 8.5), 3 plays per player
Actually, I'd argue that it might be *stronger* in 3P than in 2P for this reason. If each player buys one copy, then in 2P, assuming an even split of plays, each player will have 5 Ruins in their Exile mat. In 3P, each player will have 7 Ruins in their Exile mat. In the later scenario, there's a greater chance of having a better variety of Ruins
However, the biggest flaw that I see (especially for this particular contest) is that this card
won't play the same for everyone in most cases. Even if each player buys one copy and plays it the same number of turns before the Ruins pile is empty, so that they have the same number of Ruins on their mat, it's improbable that they'll have the same Ruins on their mat. This means that each person will have a different set of options for how to play it