Cions of Vega (UP)

Story-related; After progressing to the fourth main area, grab the axe from the porch of the building and use it to chop the vines at the cave entrance. Enter the cave, grabbing the torch from the right, then continue deeper into the cave to find the key. Come back out and continue along the path to the next gate.

​​​​See Cult (50G) for a full video walkthrough!