How can you create a combo with Mystic Barrier, Clever Impersonator?
user
[START OF COMBO]This combo can be formed with Mystic Barrier, Clever Impersonator

Color identity: WU
Mana cost: 
Steps:
  1. At the beginning of each of your upkeeps, Mystic Barrier and Clever Impersonator trigger, choosing "left" for Mystic Barrier and "right" for Clever Impersonator.
  2. As long as there are three or more players in the game, creatures cannot attack.[END OF COMBO STEPS]

Result:
  - Creatures cannot attack[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have at least two opponents.
[END OF COMBO PREREQUISITES]
assistant