What is the nickname of the NBA player whose team competed in the Western Conference in the season 2006 and who had a total of two blocks?
completed in the Western conference refers to conference = 'West'; in season 2006 refers to season_id = 2006; total of two blocks refers to blocks = 2; nickname refers to nameNick
SELECT T2.nameNick FROM player_allstar AS T1 INNER JOIN players AS T2 ON T1.playerID = T2.playerID WHERE T1.blocks = 2 AND T1.conference = 'West' AND T1.season_id = 2006