Green Mana
     To  get lots of green mana to use anyway you like, get a Llanowar
Elf in your deck and cast it. When you need green mana, select the elf
and  use  his  green  man ability. After you use this ability, quickly
select  the  elf  again  and  reuse  the  ability  before the computer
registers the usage. You may repeat is necessary.