It's very simple. Scissors cuts paper, paper covers rock, rock crushes lizard, lizard poisons Spock, Spock smashes scissors, scissors decapitates lizard, lizard eats paper, paper disproves Spock, Spock vaporizes rock, and, as it always has, rock crushes scissors
Sheldon: I have got the Sword of Azeroth! Leonard: Forget the sword, Sheldon. Help Raj. Sheldon: There is no more Sheldon. I am the sword master! Wolowitz: Leonard, look out! Leonard: Damn it, Sheldon, we're dying here. Sheldon: Goodbye, peasants. Leonard: Bastard teleported! Raj: He's selling the Sword of Azeroth on eBay. Leonard: You betrayed us for money? Who are you? Sheldon: I'm a rogue night elf. Don't you people read character descriptions? Wait, wait, wait... somebody just clicked Buy It Now. Wolowitz: I am the sword master!