Priest's special longpoint is a custodia of longpoint family. It allows to close the distance even more while remaining in the bind. I start in binding below and on the left. I will keep our blades in the bind and switch into priest's special longpoint while stepping forward. This action is considered to be a siege, even though it is happening in a shorter distance then usual.
If this siege suceeds, I will end in a grappling distance, nad I can launch one of the two grappling plays (frontal arms grab or back arms grab).