A Dimir artifact for the low cost of two mana, Time Sieve can be tapped to sacrifice five artifacts, allowing its controller to take an extra turn
Use Attunement to fill the graveyard with enchantments, bring them all back into play with one fell swoop using Replenish, and have one of them be Opalescence so you can attack for twenty the following turn
In Magics first ten years, that philosophy seemed operational enough to make a decent number of them
The bottom line is that while fetches are often obstructively expensive, they allow for much more diverse metagames and encourage more brewing
But before even that, we had an entire month to enjoy Duskmourn with the vanilla MTG Standard flavor that we had enjoyed a few months after its rotation last September
While Goldspan Dragon is in play, treasure tokens you control generate two mana of any color instead of one