This list took an unbelievably long time to compile, and I still guarantee you I missed one or two
The deck needs a critical mass of spells to combo off and discard denies this to Storm
(2019-05-03) If the chosen permanent is copying something else (for example, if the chosen permanent is another Spark Double), then Spark Double enters the battlefield as whatever the chosen permanent copied
Put simply, its a value engine that also can close out a game, and a cheap one at that - sitting at less than $2, this is at an all-time low, down from a historic high of just over $16 about two years ago, no doubt thanks to a slew of reprints
Modal cards, which we've had in Magic for decades, are almost always a bit better than they look at first glance since they offer options
This was the third and final four year lull between momentous bannings