How can you create a combo with Moat, Mystic Decree?
user
[START OF COMBO]This combo can be formed with Moat, Mystic Decree

Color identity: WU
Mana cost: 
Steps:
  1. All creatures lose flying and Islandwalk.
  2. Moat prevents things without flying from attacking.
  3. Creatures can not fulfill the conditions nessasary to attack.[END OF COMBO STEPS]

Result:
  - Lock in which no creatures can attack[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant