Uh oh

As Uh oh enters the battlefield shuffle X Uno Reverse cards into your library where X is the different colors of mana used to cast this spell. Shuffle your library, if an Uno Reverse card is on top you win the game.
As long as Uh oh is on the battlefield cards from all card games games are legal unless banned in their standard format. (The same is true for what ever format you're playing.)
{t}{4}:Shuffle your library, if the top card is not from the primary card game you're playing reveal it