When deciding what I wanted for my main Standard deck now that Dragon's Maze is out, I was stuck between wanting to return to Grixis, or trying out BUG. Grixis seemed like it was pretty decent and consistent, but BUG now seems quite strong.
I ended up taking the greedy path, and just went GRUB, but now I can't work out a mana base. My friends couldn't help me that much since they don't have experience going more than three colors; helping me work out a four color mana base didn't get far. Usually the problem was having too many shocklands.
Here's the mainboard list so far without lands. It's still under revision since I just thought of this idea, and may find better options for some cards.
Main Deck:
4 Snapcaster Mage
4 Vampire Nighthawk
4 Bloodline Keeper
2 Olivia Voldaren
4 Thragtusk
2 AEtherling (As much as I love this card, it may need to go, but I'm very hesistant to replace it)
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20 creatures
3 Duress (Might replace, but I think this is alright)
4 Farseek
3 Dreadbore
2 Abrupt Decay
2 Putrefy
1 Gaze of Granite
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15 Other Spells
4 Overgrown Tomb
3 Watery Grave
3 Blood Crypt
1 Stomping Ground
1 Steam Vents
1 Breeding Pool
4 Woodland Cemetary
4 Drowned Catacomb
4 Dragonskull Summit
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25 Lands
Sideboard:
1 Grafdigger's Cage
2 Pithing Needle
2 Appetite for Brains
1 Rakdos Charm
1 Gaze of Granite
2 Slaughter Games
1 Reap Intellect
5 (Pending)
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15 Cards
Probably will need to forsake basic lands to make the mana work properly. May not even be able to run any utility lands. One thing my friends seemed sure of, however, is that I should at least max out on Green-Black lands, since those are the heaviest two colors in this deck.
EDIT: Changed it up a bit. Added one more Duress, then cut the three Deathrite Shamans, then added one Gaze of Granite, bumping the land count up to 25. Still seems that Green and Black are the most prominent colors. Made these changes since I'm not sure if Deathrite Shaman would really work, and it bothers me only having two Duress.
EDIT2: Made a mana base for the deck, but it's kinda dysfunctional. Because the deck is extremely black heavy, I maxed out on all the black lands in my colors, but after a few tests, I realized I can't get my Blue and Red mana as often as I would like.
I also made an incomplete sideboard, which I will need to take into account later as I still try to figure out my mana.