A World of Fallen Stars

({t} to add {c}{c} to your mana pool)
Colored mana symbols on cards in your hand may be treated as if they were phyrexian mana symbols of the same color. (For example, a card in your hand with a mana cost of {1}{b} may be played as if it's mana cost is {1}{p/b})
Argentium to Mirrodin to New Phyrexia to Nothing. Every story ends the same way.