How can you create a combo with Maskwood Nexus, Avatar of Woe, Faces of the Past?
user
[START OF COMBO]This combo can be formed with Maskwood Nexus, Avatar of Woe, Faces of the Past

Color identity: UB
Mana cost: 
Steps:
  1. Activate Avatar of Woe by tapping it, destroying target creature.
  2. When the creature dies, Faces of the Past triggers, untapping all creatures you control.
  3. Repeat as desired.
  4. You may repeat this loop whenever a creature enters the battlefield under an opponent's control.[END OF COMBO STEPS]

Result:
  - Destroy all creatures opponents control
  - Destroy all creatures that enter the battlefield under an opponent's control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Avatar of Woe does not have summoning sickness.
[END OF COMBO PREREQUISITES]
assistant