Sword of Summer
The Sword of Summer is an ornate, ceremonial wooden sword, clearly not meant to be used in combat. It serves a symbolic purpose of allowing the Goblin Market to take place with members of both the Summer and Winter Courts, while forbidding and violence to take place in the market between those two Courts. The Erlking lays his sword, given to him by Winter, upon the ground at the beginning of every Market, symbolic of his goodwill. If it is removed by anyone other than a wyldfae of his choosing, the Market is at risk, for surely such a measure would earn the ire of both Summer and Winter, and its absence removes any protection the market had from inter-court violence.