Generally, whenever you need a mono-color deck to do something that its color can't really do, try this: use artifacts and other colorless cards to do stuff your color can't (try searches like colorless + "destroy" + "permanent")
Of course, when you run so many Urborgs, you run into the problem of drawing more than one, but the new legend rule mostly protects you, not to mention Pack Rat can help
Countermagic becomes more valuable as the power level of decks increases, as youre more likely to run into combos that need to be answered on the stack before they resolve
A stack of sleeved cards is no match for being dropped or smushed around in a backpack
If this is the same Black Lotus, perhaps that's why it sold for such a high price
So, even in games where you are not drawing Lotus Field, this card still has a decent impact