Evolution: Put on one of your Angel Command
Shield Force (When you put this creature into the battle zone, you may choose one of your shields. While the chosen shield remains in the shield zone, this creature gains the following [Sheild Force] abilities):
[Sheild Force] : Non-light creatures cost 4 more to summon.
For each fortress in your shield zone you may have your creatures cost 1 less to summon. They can't cost less than 1.
Double Breaker