Gyruda, Doom of the Depths can do a lot for a little and is easy to find if you only play with even-mana cards
Their historical and cultural significance has kept their popularity alive for well over 30 years, and while all of them have a designated spot in MTG's lore, one card in particular stands out above the rest, even for non-MTG fans
they get freely passed around at limited events based not on price but on need
We all know how good Edric, Spymaster of Trest is at quietly pushing a table away from you when you want it too
Lightning Helix "Basically the awesomest card ever." Life gain gets no respect, because when you invest mana and cards in life gain it has the nasty habit of not making a difference, especially when you're trying to play a burn-heavy game, which either involves trying to burn out an opponent or all opposing creatures
3) 1977 Topps Luke Skywalker #1 (Series 1 Blue) Every hobby needs a starting point, and for Star Wars cards, it begins with Luke Skywalker at card number one