Although Shadow Bee was currently loyal to him, Ethan didn't forget about solidifying that loyalty.
The fastest way to achieve that was by killing the members belonging to the other Hermit Tribes.
From Shadow Bee, Ethan learned that other than his Primal Fang Tribe, which has become a thing of the past now, there were three more Hermit Tribes.
They are:
[1) Bloodclaw Tribe]
[2) Bonepiercer Tribe]
[3) Moonshadow Tribe]
The team they encountered in the afternoon was from the Bloodclaw Tribe, and according to them, the other two Hermit Tribes have sent a team each to get the Beast Heaven Orb from Shadow Bee.
Since the team from the Bloodclaw Tribe has already found them, Ethan guessed the other two teams might be close to them or even watching from a distance.
Hence, before they resumed their Beast Purification Mission in the afternoon, Ethan had quietly sent the purified Rank 1 and Rank 2 Giant Rats to spread around them for a few kilometers.