Whenever a full{{PL|::SPN|crimson|2em}} towerlands ison formedthe in one color{{PL|::ML|crimson|3em}}, thatto tower becomescreate a blockade,tower makingin movementall moreone difficult for your opponent. As soon as the 1-pip is placed on the 2-3color pip({{PL|::SML|crimson|3em}}), take the largest available pyramid from the black supply and place that pyramid on top of your tower. That tower becomes a blockade, making movement more difficult for your opponent.