The instructions describe starting with seven (polyhedral) dice, including a d4. It also describes a dwindling pool, such that every die will eventually get stacked on the tower. A d4 die is almost always a tetrahedron with a base larger than any other die’s faces, opposed not by a face but a single corner between faces. How the fudge do you continue stacking the tower with “a second polyhedral set of dice” above that tetrahedron?