Actually , i thnk a Shadow Clone should be more then tat , 1000 Charka ( Rank-B ) to perform the Jutsu , at best , a " normal " Shadow Clone Jutsu can produce up to abt 5-8 Clones , a Multi Shadow Clone Jutsu is different from a normal Shadow Clone Jutsu , first , a Multi Shadow Clone Jutsu is Rank-A , it takes up more Charka , allowing us to produce more clones , so i thnk maybe 100-150 is too little