"Unexpected Power" continues where "Bird's Eye View" left off, forming part of Prologue: Act I - The Outlander Who Caught the Wind in Genshin Impact. Here’s how to proceed with this quest segment.
Image via HoYoverse.
Unlocking the Quest 
1.Prerequisite: Complete "Bird's Eye View," which concludes with receiving the Wind Glider from Amber.
Quest Walkthrough
2.Meeting Kaeya: After your initial exploration of Mondstadt, meet Kaeya outside the Knights of Favonius headquarters. He will test your abilities to ensure you're capable of helping with the city's issues.
3.The Test: Combat Training: Kaeya will lead you to a training area where you'll fight some hilichurls. This part introduces you to more combat mechanics, possibly including elemental reactions if you have access to another element at this point.
4.Investigate the Strange Power: Following the combat, Kaeya might mention or direct you to investigate an unusual occurrence or disturbance. This leads to:
5.Domain Entrance: You'll be directed to a domain or a similar mystical place where this "unexpected power" is manifesting.
6.Domain Challenge: Enter the domain where you'll likely face a series of enemies or puzzles that utilize elemental skills. This could be your first encounter with how domains work in Genshin Impact.
7.Confronting the Source: Inside the domain or at the site of power, you'll uncover or interact with something causing the disturbance, possibly an artifact or a creature with unusual abilities.
8.Return to Mondstadt: After dealing with or learning about the source of the power, return to Kaeya or another key figure in Mondstadt to report your findings.
9.Quest Completion: Discuss what you've found with Kaeya or possibly Jean, the Acting Grand Master. This conversation might wrap up the immediate concerns about the unexpected power, setting the stage for further investigation or quests.
Quest Rewards
•Adventure EXP: To help boost your rank.
•Primogems: A small amount for quest completion.
•Character EXP Materials: Like Hero's Wit for character leveling.
•Mora: The in-game currency for general use.
Quest Tips 
1.Elemental Synergy: Use this opportunity to understand elemental interactions better, especially if you've gained access to more characters or elements by this point.
2.Domain Preparation: Domains can be challenging. Make sure your characters are adequately leveled and equipped. If you're having trouble, consider co-op mode if available at this stage.
3.Explore After Completion: After this quest, take time to explore Mondstadt further, engage with other NPCs, and perhaps start some side quests or daily commissions.
4.Keep an Eye on your Adventure Rank: Certain features and quests unlock at higher Adventure Ranks, so keep completing quests and exploring to rank up.
This part of the quest not only advances the storyline but also immerses you deeper into the gameplay mechanics of Genshin Impact, particularly focusing on combat, exploration, and the significance of elemental powers in Teyvat.
