In the world of Rock Kingdom, the number of spirits is quite large, and some missions focus on spirit investigation. After the investigation, relatively rich rewards can be obtained. Among them, the side missions of spirit investigation are quite long, and many players say they cannot complete all of them, so they ask how to complete the spirit investigation in Rock Kingdom? Here, I will provide a general method for completing the spirit investigation.

The first spirit investigation mission requires capturing a fire-type spirit. It's recommended to directly capture Fire Feather, as this spirit has a very low capture difficulty; basically, preparing a water-type spirit can smoothly complete the capture. Five such spirits need to be captured to obtain the spirit fruit required for the mission.

Then, go to the sanctuary to hatch this fruit. After hatching, you can get a character with an amazing talent, and the other five Fire Feathers have different characters. Thus, the first stage of the spirit investigation mission is completed.

The second spirit investigation mission is to increase 35 effort points for the spirit, which actually means upgrading the spirit to 4 stars. To upgrade to 4 stars, fragments of the same type of spirit are needed, and these fragments can be obtained by releasing spirits of the same type. Therefore, in this stage, it is recommended to catch more Fire Feathers until the corresponding Fire Feather can be upgraded to 4 stars, thus completing the second stage of the challenge. This process is quite time-consuming, and it is recommended that players go to where Fire Feathers spawn to catch several more.

Finally, challenge a legendary spirit above 4 stars. The target of the challenge is Wing King, and only Fire Feather can be used in battle. Therefore, it is recommended to carry the skills Warm-up Exercise, Three Cheers, and Chase. The order of skill release is to use Warm-up Exercise to increase one's own action, then use Three Cheers to further increase attack power, and finally use Chase to achieve a quick kill. However, it's best to level up to the maximum at the 4-star stage to ensure a stable quick kill of Wing King.

Currently, this is all the information provided by me on how to complete the spirit investigation in Rock Kingdom. The overall process of these three stages of missions is still quite long, requiring the capture of several Fire Feathers to complete the 4-star evolution, and finally, killing a 4-star boss to complete all challenges.