Hey, is this still a work in progress? It's a little hard to follow with the lands filtered by colour identity and then lands that tap for colourless included in each list. Any option to move lands that can be in ANY mana base (like Aether Hub) go in an "ALL" colours section? may be easier to read that way

meowndabout, it is a work in progress, and I did consider that, but what I am first going to do is refine what can go where. Aether Hub for example should be showing up only at the tri-color combinations instead of at the bi-color combinations.

Certain lands are only good once you have a certain number of colors, and I want the list to also reflect that, so I will keep thinking about how to make the list better.

Totally open to input as well! :D

Urborg, Tomb of Yawgmoth

arcane_trouper, I considered it, but ultimately felt like it didn't fit since it didn't actually provide 2 colors of mana.

Similarly, would I include a swamp that had the ability ", : Add ." since it could take a forest and produce two black mana? I would say not. :O

But compare it to Reflecting Pool. Reflecting Pool doesn't give you access to colors you didn't have before you played it, but makes it easier to hit double pips. Same with Urborg, except it gives you access to black if you didn't have it before.

To your hypothetical, would argue that your hypothetical land would be good enough to include. Free color fixing is great.

arcane_trouper, well every deck wants access to all of its colors, that's a given. Bi-color decks want their colorfixing lands to fix both their colors, not just one. For three color decks and above, the best options for fixing all their colors come into play tapped (except for the fetchlands) so they mostly resort to using bi-lands rather than tri-lands.

Urborg is a great utility land, but as a colorfixing land, it can only help you produce one color.

I play a Steam Vents turn 1. I have access to to U/R.

I play a Reflecting Pool turn 2. I have access to U/R, and can cast spells with double U or R.

In a different game, I play a Steam Vents turn 1, and then Urborg, Tomb of Yawgmoth turn 2. I now have access to U/B/R. In addition, I can now cast spells with double B (something I couldn't do if Urburg was only a swamp).

I agree, it's not typical color fixing. But if your deck has any double B spells (or if you intent to cast more than a single black spell a turn) Urburg is definitely color fixing. And like the ABU duals, the cost of inclusion is so low.

I guess my point is it doesn't matter if Urborg itself can produce multiple colors. What matters is it makes the color casting costs of spells easier to cast by increasing the amount of color combinations you have access to, with regard to multiple black pips. And it does this at almost no deck building cost. I'm not sure how else you define mana fixing if not helping you pay the color costs of your spells.

arcane_trouper, I think I have the best answer: Urborg Tomb of Yawgmoth turns basic lands (or other noncolorfixing lands) into colorfixing lands. Sounds good, right? Well, depends on how many basics you're playing.

Imaging you are playing a Golgari deck, and you were able to play 35 lands that can produce both black or green, but you wanna add one more colorfixing land. If you add Urborg Tomb of Yawgmoth, it isn't helping you fix your colors. It's basically worse than a Swamp. If instead you were playing 35 Forests, Urborg would turn all of them into Bayous. In that case, it DEFINITELY fits on this list. So to answer the question of whether or not it's a color fixing land rests in this: which situation is closer to what's most likely? Or in other words, do multicolored decks needing specifically double black (or more) tend to have more lands that can't produce black or lands that can? My money is on them playing other lands, and still using Urborg, but more for the utility rather than the colorfixing.

I agree that Urburg turns other non-swamps into color fixing lands. But it's not just basic lands it helps; it even turns non-black producing color fixing lands into even better color fixing lands. What's better than an ABU Volcanic Island? A "Swampy" Volcanoc Island.

What other utility does Urburg have besides color fixing?

arcane_trouper, it provides you with more mana in tandem with Cabal Coffers, it enables swampwalk creatures, and it even makes cards like Karma into reliable win conditions.