The effect of this card is risky to use, but when everything goes right you can reap a huge reward by doubling most mana across the board, you can use high mana maneuvers like those seen in a Vial Smasher not-white four-color commander deck
Now, with the addition of the Theros self-hate cycle, there is now a wide selection of removal which is colour dependent
[1] [2] [3] The mechanic was introduced in Alpha , on the cards Clone and Vesuvan Doppelganger
These cards are difficult to pull and are often among some of the top chases of their sets due to their intricate, desirable artwork and challenging pull rates
From the Crimson Invasion Set
What's in the Box Shadows over Innistrad gives you 24 miniatures, 8 dice, several 2-sided map boards, 48 spell cards, 3 funky-looking Cyptoliths, 9 sand terrain tiles, 2 glyphs, and lots of little red wound markers and augment tokens