One of my favorite features of Blizzard's new game Hearthstone is the Forge. This allows plays to create new decks on the fly by selecting one or two cards at a time from a selection of three on screen. Once you've put together a 30 card deck, you and your opponent go to town. The decks you mare are temporary, as in you can't keep the cards. But this is beauty of the mode! You'll never get bored with the same ol' deck, and you'll never make the same deck twice!