Urborg,Tomb of Yawgmoth+Cabal Coffers or Nightmare or Squelching Leeches or Quag Sickness

Using urborg, which makes all your lands swaps, for two mana you can double all the mana available to you, with cabal coffers. With quag sickness or nightmare/squelching leeches, you can have a powerful creature and good creature removal.