Most mechanics are tied to a specific set or location, but some are considered so flexible in their use that they are put in almost every single set, making them 'evergreen'
They've gone from being a somewhat underwhelming and underutilised mechanic in Ixalan to something that borders on being broken thanks to the likes of cards like Korvold, Fae-Cursed King
It gives us a sticky threat that is immune to sorcery-speed wipes like Deadly Cover-Up and continues to pressure the opponent even after our hand is empty
Aggron boasts both a Reverse Holo and a Holo Rare, which makes its value slightly more complex to analyze
Edgar, King of Figaro Edgar, King of Figaro was tough to snub from the #1 spot, but it is limited to the blue color identity, and red is the color you want for the chance at the most coin flips
The border is indeed the first to fade on old WotC era cards, but eventually the card itself starts to fade as well after a longer period of time