Legacy and Modern still exist, after all
The Sphinx is a great way of keeping mana up during your opponents turns, but not for having splashy second main phases like you may have expected
Because of this structure, Beckett slabs often appeal to collectors who study condition closely
Similarly, the Dimir deck uses cards with keyword power
EX cards are more modern, as they ran through the Black & White and XY eras, Those featured Pokmon breaking from their border, full card foil, and visual effects
Not only does this allow the land to produce mana of any color without the loss of life, but you can also sacrifice the fetch land in response to the card draw ability to improve the quality of your deck before you draw a card