I did a lookup of some lands in mtg...
I noticed that most of the uncommon lands are mana based.. and the name doesnt really mean anything.. it just has to correspond with color..
some of the rare lands have an added bonuses, and sometimes mana production to increase the chance that people will play them.
Dust Bowl: taps for mana, kills lands
Halls of Mists: stops creatures
Island of Wak wak: stops fliers
sorrow's path: exchange control of blockers
Thawing Glaciers:retrieves lands for 1 turn, 1 mana, and in place of playing 1 land.
Safe Haven: removes creatures you control from harm
Ice Floe:keep creatures tapped. (flavor based)
pretty much every land with an effect, except for a few like wintermoon mesa makes sense with the card name..
I think if i made alleyway say something like
T: Add B to your mana pool
All creatures gain haste.. it would be ridiculous and the only flavor that makes sense is that it produces black..
it shouldnt be much of an issue though...
the ghetto set gave me a chance to make several lands... i don't ordinarily like doing them..
I have 2 im planning.. one which i may use is "Ghetto Mart"
which will reduce costs of spells/abilities but make creatures lamer overall..
and "Liquor Store" in which all creatures get +1/+0 and whenever a creature is declared as an attacker, you have to flip a coin. If you call it incorrectly, the creature taps and doesnt attack... kinda like.. they think they're a little stronger but drunk.. so when they attack.. theres a chance they wont be able to stand up straight...
see
the flavor works..