A remarkably balanced, well paced, and replayable card game. God it feels so good to build a strategy out of all of the weird relics and cards you end up with through the run. I don't think I've replayed what is essentially the same game this many times and never once felt bored. I think StS hit the sweet spot in run length and difficulty curve. It's so easy to pick it up, give the spire another shot, and put it down whether it's a victory or a loss. And somehow out of dozens of failed attempts with what seemed like miraculously perfect decks, I never felt demotivated starting back at square 1.