Windy Cave Treasure
Heading south of the Mistriven Waypoint, make a right going west. The entrance to the cave has a stone wall on the right with some ooze inside the entrance.
Making your way up wooden platforms and parts of the wall is needed to advance. There are many enemies in the cave, and many veteran enemies, so it is best to complete this challenge with a party or at higher levels with a durable character. You will know you are going in the correct direction if you continue to see ooze and veteran ooze along the path. You'll know you're at the end of the mini-dungeon when you go down a set of stairs where a veteran ooze and a Grand Chest are located.