old version: So Artifact is basically Tournament for coin tokens. Sometimes, it's pretty weak, where you'll probably invest in +Card first, then +Buy/+Coin, then finally +Action. It's not a bad card then, but it still is cheaper than any of the Events, even if you cannot use them all. Is anyone going to spend +buy on this card? Not unless there's no +buy on the board, and there's an engine. Other times, all you need is a 5/2 on an engine board with no village, and suddenly you're going to destroy your opponent before he even has a chance to buy a card.
I like the concept in theory, but it also wrecks coin token events in a sense. There's the possibility of going for Coin Tokens that aren't able to be bought, then moving the +Action via Lost Arts to get something going as well.
I feel like this card is a little too strong for $5 at worst, but it's also weak when it's no good. I don't think I would like this card much in it's current state. What if your opponent hits $5 twice on turns 3 and 4, while you somehow miss $5? I know that's devastating in general, but it kind of extra sucks in this case. I repeat that this feels like Tournament for coin tokens.
(edit) new version: This version is worse. It's weaker, and it's completely dependent on random shuffle luck. Want that +Action Ruin? Too bad, little Johnny got the only one! Now it kind of feels like Tournament and Swindler at the same time.