Basically, we've reached the point where any Magic carddown to Expeditions , Inventions , and other Masterpiece -series cardscan be counterfeited, and with the cost of real Magic cards on the rise, especially in older formats, there is a huge incentive for the counterfeiters to hone their craft and make their fake cards as realistic as possible
Proliferate works wonders with this card, and in some scenarios, it can even go infinite
If the Desert leaves your graveyard before the delayed triggered ability created by Desert Warfare's first ability resolves, that Desert won't be put onto the battlefield from its new zone when that ability resolves
It's a good thing, too, because some of these cumulative upkeep costs can be quite oppressive
Its either not quite on rate or underplayed in artifacts decks