- Talk to Cruise to get this quest.
- Finish Elder's Healthy Food Quest you will need Elder's Gypsy Letter
- Speak to Elder in Sevis (East in Sevis). He'll tell you to go to Red Soil Cave.
- Try to enter Red Soil Cave (Southern Red Soil, northern cave), you'll find that an invisible force blocking it.
- Take a long walk back or teleport to West of Laywook Forest and speak to Vivi to get a Vinagh's Card.
- Return to the Elf Queen and speak with her.
- Bring an Aleph's Crystal with you and enter the Red Soil Cave.
- Investigate the Illuminating Spot by breaking an Aleph's Crystal and receive a quest with name Image of Red Soil Cave
- After you learn that Aleister try to save his lover Etwa and failed, and then Samael lives inside Aleister. You will get this quest :