Whoosh!
Bing Xue flew north at a high speed. She took out a seed pouch from her spatial ring and opened it to reveal dozens of small unassuming brown seeds. They had wrinkles and looked like miniature walnuts.
Swish!
While still flying, Bing Xue flicked a seed deep into the soil. She had tested the hardness of the seed before and knew that it wouldn't break from that.
Immediately, Yue Ling'er felt a connection to the earth, and mere moments later, another one appeared in the south.
These seeds allowed Yue Ling'er to form a mental map of the terrain several miles around each seed. This way, she would have a vision similar to that of Xu Ming's Formation eye, and watch out for any anomalies. She herself also dropped a seed every so often, enlarging the mental map.
A few hours went by, until she finally found some odd energy signatures.