Final answer:
The meeting with the crows had a significant effect on the Kiowas, protecting Gil-Dong and causing harm to the assassins.
Step-by-step explanation:
The meeting with the crows had a significant effect on the Kiowas. In the narrative described, the crows cawing three times and flying away signaled something ill to the protagonist, Gil-Dong. As a result, the assassins who entered Gil-Dong's room were unable to harm him. Instead, they ended up injuring each other and killing their guide. The crows, therefore, played a crucial role in protecting Gil-Dong and ensuring the demise of the assassins.