Limiting dusting to common and uncommons to avoid the feel bad moment of dusting a rare or mythic and needing it later
Now, the company wants them out permanently
(2/18/2022) If an opponent gains control of one of your creatures, that creature phases out, and the duration of the control-change effect expires before it phases back in, that creature phases in under your control as that opponent's next untap step begins
The Standard Format Changes, sometimes twice a year depending on set releases, will have the most up-to-date rules for tournament play
There are also patterns on some reverse holo rare cards, but they are less sought after
If Goldspan resolves, its very hard to remove from the board, especially in a deck like this