Special secunda custodia

An additional guard, also known as guard of Walpurgis, as it is presented to us by the female protagonist of the manual. The position is used as a siege, but the context is unknown. 

Possibly it can besiege only prima custodia, by thrusting the shield and sword forward and pinning the opponent's weapons at his body. The killing blow delivered after successful siege should be halpschilt, as the play of Walpurgis says.