The entrance to the Wyvern's Cave is found at 4065, 1680 in the Fourth Cloakwood area. Inside are two adult Wyverns, needed for Coran's companion quest, three Baby Wyverns and a corpse. The corpse may be looted for 62 gp, a Jade Ring, a Water Opal, a Garnet, a Wand of Fear with 10 charges and a suit of Plate Mail. Rest in this cave is interrupted by an adult Wyvern about 90% of the time, for a quick and easy 1,400 xp and a Wyvern Head each time.