On the promo side, the Buy-A-Box promo card is a special version of Singularity Rupture
Obscura Confluence Confluences are usually very strong, combining flexibility and card advantage with a lot of modes
The over-zoomed face of Ozai on Cruel Tutor has become the poster child for this problem, but the rest of the sheet had issues, too
Honestly, if youre doing Undercity, your curve should be more midrange and you should play more haymakers because finishing Undercity is too good to pass up on
Often decks that were based on creatures in game one can spring this card on their unsuspecting opponents in game two and ride their direct damage to victory against a player who suddenly has no way to win
Ive tried two variants of this Cube, one with the cycle of signets, and one with the cycle of Talismans