The definition of Mean Green, this was a Surge deck before Primal Surge was ever printed.  Multani is a Giant, and sac'ing him to draw cards adds to your hand a total of all cards in all players hands.  This kind of massive draw paired with ramp/cheat and haste means death to the rest of the table.  Note-ables :: Eureka (win), G-wave (your deck), Primal Surge (your deck), and Eternal witness to do it all again.  Forgot to mention Multani has shroud.  Pair it with greens abundant trample, and "Here's Johnny".