For me, Push deserves a Top 3 spot, but I can see how it falls just behind the next card
Either 4 or 8 life is a lot to pay to get ahold of two extra cards, but life is a resource after all
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
Multiple square corners are always on adjacent corners, most commonly either the left or right, but top and bottom are also possible
Your deck is pretty likely to have effects that this shuts down, so you have to be careful about when you play it
Better still, theres no need to limit ourselves to just one of the above themes, since the creatures you want both enable and benefit from a mill plan