If two or more Monsters move from the Swordsman ring to attack a Wall at the same time, the Wall is removed and 1 Monster (players’ choice) takes 1 point of damage. The others are unharmed.
If two or more Monsters move at the same time into the same space as a Tower, the Tower is removed and 1 Monster (players’ choice) takes 1 point of damage. The others are unharmed.