Players logged in on CrazyGames play online against everyone on Shardmoon: same player pool, same game server, same leaderboard.
Other changes
CrazyGames version: if you are logged in on CrazyGames, "Play Online" opens Quick Game, Ranked (from level 8, as everywhere) and the leaderboard. The first time you confirm once that you are at least 16 and accept the terms of use and the privacy policy; then your Shardmoon account is created, bound to your CrazyGames account, and opens on its own on every later start. No email address, no password, no extra login.
Your CrazyGames name is your player name and shown in matches and on the leaderboard. If another player already has it, "_cg" is added (then "_cg2" and so on). If you change your name on CrazyGames, the game takes it on the next start.
Signed in, the CrazyGames version also has Quests and the Collection with your decks; your wins as a guest come into your new account. Shop, Moonglass, chat, trading and invites stay off there.
Guests on CrazyGames keep playing the tutorial and against the computer and see a small "Log in with CrazyGames to play online" button; the CrazyGames login only opens when you press it.
Privacy policy: new section on the CrazyGames version (what we receive from CrazyGames: user ID and name).