From a gameplay perspective, it's incredibly easy to get out, immensely oversized on the battlefield, and resilient to removal, since you can cast it from the graveyard
It was finally banned in Legacy and thus deserves a high spot on the list
The inclusion of glycerin ensures a smooth and controlled response to fluctuations in humidity, making it more efficient than single-function solutions like silica gel
Pocket might be able to cut through currently because it is modern and fresh, and a little bit trendy, it may fall to the same fate as its predecessor
If you cast an instant or sorcery card this way, it goes to its owners graveyard as normal
They could have done plenty of things differently to actually make these a massive success and warrant a mase print run but instead they made them generic reprints that just have a stamp on them #6 Golly, can't wait for all the middle-aged white guys to buy these up and immediately invalidate the inherent purpose of these packs