#2 Gotta be And These are, similarly to the OP's, two lands from the same set
Even better, if one of your big creatures hits with 7 or more power, you get another combat phase, letting you keep swinging and snowballing momentum
Creature - Dragon Hide in Plain Sight Look at the top five cards of your library, cloak two of them, and put the rest on the bottom of your library in a random order
Really, I think all this salt is due to that one player we all know who just adamantly refuses to pay the 1
But probably the most obvious examples are the Plague Rat and Benalish Hero decks
Due to general creature power creep post Invasion and due to me first building my cube in 2005 I am starting to see cards that were once cube staples