Bait
In the same way the rat tide had been learning as time passed, Kris had also been learning more and more about it in return, and it was inevitable that he noticed a few things.
First was the nature of its consumption and how it grew.
The rats seemed capable of eating anything. Rocks, trees, other animals, and even the energy that made up his chains.
Moreover, his chains were, naturally, quite good, so they were especially appealing to the rats, and as the source of the chains, he was deemed the most 'tasty' thing in the vicinity, hence their focus on him.
Following that, they seemed to have an uncanny ability to sense what was around them and what was good to eat. This sense seemed to extend even through physical matter, as Kris had tried a few times to stick his chains underground to set traps, but the rats always noticed and ate them.
