You must now venture into the wood and show your proof to its denizens in the hope of aid.
This quest is available if you have completed the quest Put to the Proof, and have reached level 75.
Starting the Quest
Talk to Y'shtola in the Rak'tika Greatwood to begin the quest.
Speak with Y'shtola
You can either teleport to Slitherbough, or you can go east to where the orange arrow is pointing in the minimap. Go to the quest icon and talk to Y'shtola to proceed.
Survey the Area
Go southeast until you can go northeast to where the orange arrow is pointing in the minimap. Check on the sparkling Destination to proceed. There will be a cutscene.
Speak with the Bow-Wielding Sentinel
Go northeast to where the orange arrow is pointing in the minimap. Talk to the Bow-Wielding Sentinel to complete the quest. There will be a cutscene.
Next Main Scenario Quest
After you complete the quest, talk to Cymet to accept the next quest: Top of the Tree.