This combo is named after "Hand of Six Samurai" and is really annoying.
What you need is Hand in Hand (lol) and 2 Gateway of The Six.
You Activate gateways, summon the hand a gain 4 total counters (2 each)
Then you remove 4 to grab a Grandmaster of the Ss from deck. You Special Summon GrandMaster. You have 4 counters again. You tribute grandmaster to kill an opp monster. Then remove 4 couters to grab that grandmaster from grave, and repeat till your opp has no monsters. You can hit 3700 with this simple combo, as well as clearing your opponents whole monster line-up.
Subject: Handjob! 
Mon Jul 26, 2010 9:36 am
