yugioh super starter space time showdown card list Amazon.com: Yugioh 2014 Trading Card Game Super up Pack YuGiOh Super Starter: Space-Time Showdown

I think the best reasons to be UB are strong uncommons and removal

Negation should be a 4-of in most blue sideboards

It was used by Kaiba against Yugi in Duelist Kingdom and caused him quite a bit of trouble

The Balrog, Durins Bane costs five mana plus one black mana and one red mana in order to summon, so it works really well in a Sauron-themed deck

MTG Phyrexia: All Will Be One cards On December 13 we saw our first official card previews for MTG Phyrexia: All Will Be One

[2] Specifically, each Japanese booster box is guaranteed to contain 1 Super Rare card (including Ultra Rares and Special Art Rares), 3 to 4 Art Rares, and 4 Double Rares