Dragon Key Keyhole

The is an OoS: in.

Location and Uses
The OoS: is a OoS: located at OoS:'s second to the left of four peaks. It may only be accessed by OoS: with the aid of the OoS:. When the OoS: is inserted into the OoS:, the OoS: blocking the entrance to the OoS: will stop its flow and OoS: will be able to explore the OoS:.