The Collector revealed the location of the Hollow Halls in the Revelwood. To enter, you will need a key. Craft the Key with the Collector to proceed.

The Collector revealed the location of the Hollow Halls in the Revelwood. Reach the location and descend to slay the one-eyed creature within, and take its head to enable new crafting options. Gather your strength and your allies, if present, to prepare yourself accordingly.

The location of the Revelwood Hollow Halls were discovered. Fight your way to the end and smite down the one-eyed beast to obtain new crafting ingredients for the Collector. This will not be an easy task. Gather your strength and your allies, if present, to prepare yourself accordingly.

You defeated a fearsome Hollow Cyclops at the bottom of the Revelwood Hollow Halls. Take its head and use it to craft an Ectoplasm Press. Place it to unlock better crafting options.