If you counter their spell, you usually have to target it to do so, resulting in a crime
Together, these should ensure every robots effect is utilized and supported somewhere, which will keep the deck ticking over regardless of which ones show up for you in a given game
However, if you are digging around on eBay trying to find the cheapest copies of Underground Sea, if you come across something that looks way too good to be true (like a copy that looks pack fresh for the same price as the heavily-played versions), it probably is too good to be true
That said, the rewards in AI battles flow constantly, so you wont need to fight in PvP to advance if youre not a competitive player
Buying single packs can get expensive fast, and while it's good for some fun every now and then, it's not as much of a rush as opening plenty in one go