'Legend' was originally just a creature type in these older cards, but in the future they would become essentially a supertype -- an extra adjective that tells you that this card falls under 'Legend rules', which means that only one copy of a card with the same name can exist on the board at any time (later changed to only one copy existing under the control of a player)
A bit hard to tell, but Rubinia Soulsinger is a legendary fairy
Seriously, Rogues Passage is my favorite land in all of Magic
The Gitrog Monster is an absolute powerhouse on the battlefield, letting you play extra lands each turn and drawing cards when a land is put into your graveyard from anywhere
Beta Cut to Alpha Another hobby that used to be popular was trimming cards from the Limited Edition Beta set
I know that Golgari life gain is supported enough that this is less off-beat than some of the other decks proposed, but this article is already long enough without me including a section arguing for and against each of the options