Ulgrim's Island
From Drunkapedia
Ulgrim's Island can be reached by giving the Drunken Madman in Baishi a Mug of Winter Lager. On this island you will find numerous wonders including Ulgrim's Cottage and his various stolen items and signs as well as his mini shoushi town sign renamed to ulgrim's island. You will also find Ulgrim the Unappreciated and can even obtain a shiny new Castin Stein!.