I'll try to integrate Link Summon after this current tournament is over. Until then, we will be using the old mechanics. After we go to the next turn though, I'll try to introduce the VRAINS mechanics. Easiest thing to do would just be to say that the rules set changed and leave it at that. Though, I don't think anybody's actually had more than one extra deck monster out at the same time, so it's safe to say that the mechanic's always been around. Users of Link Summon, for now, will be consolidated into the Dark Magician House unless they favor another summon mechanic. That is, if everyone is in agreeance. I'd really like to, but if a majority of users prefer I didn't, I will not.