First, we have the five cards that gained the most value in the past 30 days after starting with a Market Price of $30 or less
This value can come from more novel sources, though: haste or flash allow you to use your creature in combat before it dies, Consecrated Sphinx doesnt have any abilities when it enters or leaves play, but draws you two cards on your opponents draw step, before it can be Vindicated, and creatures with board-affecting static abilities like Elesh Norn, Grand Cenobite sometimes only need to be in play for an instant for their impact to be felt
My background is in concept art and character design for animation
In a pinch you can use it to dig through your deck to find an answer you need for a board state.
In effect, people with jobs and actual children now have a better chance of scoring cards at a reasonable price, even after Target's latest price hike
The Everflowing Well / The Myriad Pools The Everflowing Well mills two and draws two on entry, which gives you value upfront