Elsewise, "Do we have something in our hand that allows us to successfully hit a player with Yidris?" If yes, we should cast it before combat
When that spell or ability resolves, Koma won't be countered, but any additional effects of the countering spell or ability will still happen
More often, players will end up dropping expensive stax pieces into play early and lock their opponents out of the game before it even starts
In the event of any dispute between bidders, or in the event of doubt on Apple Tree Auction's part as to the validity of any bid, the auctioneer will have the final discretion either to determine the successful bidder or to re-offer and resell the article in dispute
On the other hand, the competitive scene features something called rotations that are designed to standardize a fixed number of legal cards at any given point