Take your oponent to casino

Do not play this on ladder, casual mode is recommended:)

So you have two ways to mess with our opponent:

1) You can play The Amazing Reno *Poof!* to get new hero power, and then give it to your opponent with Grizzled Wizard and copy it with Sideshow Spelleater. Each start of the turn will become more fun!

2) You can put Puzzle Box of Yogg-Saron or Deck of Wonders to your opponents hand via Lorewalker Cho and then pull out the spell with Unseen Saboteur. Dragoncaster should help you to discount the Puzzle Box.