What is the last sentence of everything has its vanquisher?

Everything has its vanquisher. The last two-part allegorical saying is as follows:

1, bamboo shoots the snake-? One thing serves one thing; Everything has its vanquisher.

2, indigo dyed white cloth-? Everything has its vanquisher.

3. Miao is afraid of cockroaches? Everything has its vanquisher.

4, saliva stained with fleas-? Everything has its vanquisher.

5, brine tofu-? Everything has its vanquisher.

6. Cats catch mice-everything has its vanquisher.

7. Jiang Sha cures fleas-? Everything has its vanquisher.

8. Badgers are afraid of bobcats. Everything has its vanquisher.

9. The eagle bites the snake and the snake swallows the mouse. Everything has its vanquisher.

10, chopping wood with an axe-? Everything has its vanquisher.