This is the worst deck ever created, just as a heads-up.
Anyway, I was getting bored with Orzhov lifegain because I felt the "combo" wasn't the real focus of the deck and that it was just a midrange pile with some nice additional synergy. Since I wanted more of a true combo deck built around Sanguine Bond, I added green because of the amazing lifegain options available in that color. This deck is completely theoretical, but I am bored at work so I decided to brew it up and post it to get some laughs out of everybody. I am going to test it tonight, though, for **** and giggles.
4 x
Selesnya Guildgate4 x
Golgari Guildgate4 x
Orzhov Guildgate5 x
Forest4 x
Plains2 x
Swamp1 x
Island1 x
Elixir of Immortality4 x
Lone Missionary4 x
Elvish Visionary4 x
Grazing Gladehart4 x
Cultivate3 x
Darksteel Ingot4 x
Saruli Gatekeepers2 x
Rhox Faithmender2 x
Sanguine Bond2 x
Species Gorger1 x
Baneslayer Angel2 x
Planar Cleansing2 x
Rune-Scarred Demon1 x
Pelakka WurmThe plan is to ramp and fix colors while defending yourself with lifegain. Planar Cleansing solves problematic boards and Elixir recycles lost pieces. Rune-Scarred is your combo enabler by fetching the missing pieces, and the Species Gorger is there to (hopefully) bounce the Saruli Gatekeepers every turn and burn them out with it, but you can also bounce Visionaries or Demons to keep the cards flowing. I'm not sure about the manabase, but I'm hoping the Ingots make the mana stable enough. They also don't get removed by Planar Cleansing because they're indestructible, which is nice.
Don't try this if you're attached to your ranking.