Helva and I play a lot of unusual decks against each other. Sure I've got the tradition Sligh decks and some of the other common types, but I prefer to play strange decks and cards which others don't play. Helva is the same way, hence the whole Overlooked card series. One of my stranger decks is one I call the Shuffly Deck. The black, red and blue deck is designed to use cards like Elemental Augury, Vexing Arcanix, Chaos Harlequin, Sage Owl, Portent, Ancestral Knowledge, and Impulse to rip through the deck and get whatever card I need in the particular situation. Usually that is a big creature or direct damage, but sometimes I'm desperate for a Swamp. I'm sure you've been in a similar situation.

Elemental Augury is the key to many of the combo's in the deck. It's an enchantment from Ice Age which costs UBR to cast. As such, it is difficult to work into most decks, but it fits in quite well to the Shuffly Deck. For three colorless mana, you can look at the top three cards of any player's library and put them back on top of their library in any order. I use this on my own library lots of times. Think of these combinations:

-with Chaos Harlequin, a 2/4 red creature from Alliances which costs to cast. For one red, you can remove the top card of your library from the game. If it's a land card, Chaos Harlequin gets -4/-0. If it's a non-land, he gets +2/+0. It doesn't tap him so you can use the ability multiple times. Late in the game, you can stack your library with non-land cards and burn them with Chaos Harlequin for one final attack.

-with Vexing Arcanix, an Ice Age artifact which costs to cast. You pay three colorless and tap it. Then, a target player names a card and turns over the top card of their library. If they guess the card, they get to put it into their hands. If they don't, they discard the card and take two points of damage. With the Augury I can always guess my cards. The Arcanix also works well by itself against your opponent, since they probably won't be able to guess correctly.

-with Anvil of Bogardan, an artifact from Visions which costs two colorless to cast. When the Anvil is in play, each player skips their discard phase. Each player draws an extra card, but also has to then choose and discard a card. Once I have enough land, I can use the Augury make sure I've got a land and a good card in the top two cards. I draw those two, discard the land and I'm in business.

As you can see, the deck has a lot of complicated cards. When I really get going my side of the table looks like The New York Times, with all the text strewn about. Just one more combo, then I'll let your brain rest. I use Citanul Flute, an artifact from Urza's Saga, to get to those big creatures. It costs to cast but after that, you can pay X colorless and tap it to search your library for a creature card with total casting cost no greater than X and put that card into your hand. For example, you could pay four mana and get that Chaos Harlequin. You have to shuffle your library afterward, which works well with Soldevi Digger. The Digger is an artifact from Alliances which costs 2 to cast. For each two colorless mana you pay, you put the top card of your graveyard on the bottom of your library. That helps get the cards back which you may have lost to the Harlequin or the Anvil of Bogardan or other discard cards I use. The Citanul Flute shuffles your library and, hopefully, brings them close enough to the top to grab with Impulse or Elemental Augury.

This deck illustrates one of the most important points in Magic. The cards are designed to work together. If you think of your deck as a coherent whole, it will perform better and you will have more fun playing.