Laughing hare

The laughing hare was a magical chalice carved in the shape of a hare. It was one of the Wo-ha Ui-jung, a collection of magical vessels created by the Han people of Koryo in ancient times.

Powers
During a full moon only, a person who drunk saki from the laughing hare would find their hearing and eyesight doubled in range for half a day. More importantly, they could conjure a single earth elemental in that time.

History
As one of the Wo-ha Ui-jung, the laughing hare 's powers had most likely at one stage influenced the history of Koryo. However, it was later lost.