Avengers Assemble includes Captain America, Team Leader, a 3/3 focused on growing in power as other heroes enter the battlefield, while Nick Fury makes those heroes cheaper to cast
The gap between "market price" and "alt art price" matters here: if you're chasing the SEC leaders as collector pieces rather than playable cards, the alternate art prints are the ones actually holding a premium
Meanwhile, Mind's Desire's cheapest printing has doubled in price, but it's still under a dollar - perhaps because there are fewer Legacy players than fans of the Modern format
Once transformed, it becomes the Conqueror's Foothold, a swiss army knife of a land that can draw cards at the cost of mana and is even capable of returning cards from its owner's graveyard to their hand
(Each in the mana costs of permanents you control counts toward your devotion to black.) Your opponents can't gain life
And different can lead to some very interesting decks and matches, especially when it gives you an excuse to dig up old forgotten cards people havent seen since they opened their first Exodus pack circa 1998