As with the Flare cycle, the Evoke Elementals each provide incredible utility for an exceptionally low cost
Professional grading company PSA has established a system that evaluates trading cards on a scale from one to 10
It also features several ways to copy lands (Vesuva, Copy Land) to artificially up the town count
Not only does it foil the plan, but you also get to choose and play the card they look for instead, which is purely evil
With those conditions met you put the untap spell on the stack, tap Stella to copy it targeting herself, let the copy resolve (untapping her), then use her ability again on the original spell to reset the loop
It was banned just days after it was printed, after all, thanks to its ability to counter your own spell and spin into something like Emrakul or Ulamog for free, usually on Turn 1 or 2