Then theres The First Tyrannic War, a saga that lets you cheat a creature out for free on cast and they also come with a potentially obscene amount of tokens if theres an X in their casting cost
In Modern and Legacy, the curve of turn one Halfling, turn two Teferi, Time Raveler could be quite infuriating for the opponent
In this way Epiphany at the Drownyard has more in common with Sphinxs Revelation than Dig Through Time, although its clearly not as good
Still, it fits my criteria of being an older rare and has a surprisingly useful effect
The design concept of Energy is simple
Commander Masters is the first Masters set created specifically for Commander, featuring iconic reprints alongside cards that were previously exclusive to Commander preconstructed decks