The white world. It is a world dedicated to 'cold' things. The ice bear and the igloo can be found here.
One player is promoted to game master for 1 round. He must memorise an object and throw the ball to any player he wants by shouting out his name and telling in which of the 6 worlds the object can be found. That player must now try to guess what object the game master has memorised by asking him all kinds of questions. The game master can only answer with a simple 'yes' or 'no'. So be clever when you ask questions. As long as you do not get a second 'no' from the game master as an answer you can continue to ask questions. However when you get 'no' for the second time as an answer, your turn is over. And you must throw Ahrbol to another player to continue the guessing. You can chose to whom you will throw the ball. The game continues until one player guesses the object. He gets a point and will be the game master for the next round. First player to get 5 points wins and becomes 'Ahrbol Champion'!