How to Unlock Green Ranger Elowen To unlock Green Ranger Elowen, you must complete an Exploration quest in Nesting Grounds. The Codex entry is called Elemental Tree Harvest: Nesting Grounds. Commune with the Small Elemental Tree at Nesting Grounds Follow the Elemental Spirit and pass all of the Old Elemental Trees at Nesting Grounds Check the health of the Nesting Grounds' Small Elemental Tree Once this quest is complete, the Green Ranger Elowen Throne & Liberty Guardian will be unlocked.