Unfortunately, once the venomous insects entered the coffin dweller's body and became parasites, no matter how strong she was, she could not control them. Every individual insect was extremely weak, yet their numbers were vast. Controlling them was simply impossible.
She could divide her Mental Power into several groups, but even then, the number of groups would not exceed the number of venomous insects inside her body.
And if she divided her Mental Power too much, her Spiritual Sea would be injured.
Therefore, the coffin dweller could not control the venomous insects no matter what. There was another issue as well: even if she possessed Internal Vision, she could not see the green venomous insects. She could only see that her Dantian and Meridians had become extremely thin, while the flow of True Essence in and out had become intermittent.
Although the venomous insects were incredibly powerful, and anyone parasitized by them could have their strength suppressed to the lowest point or even become crippled, they also had a weakness.
After entering their target's body, the venomous insects basically lost contact with their master. Therefore, their movements could not be controlled either.
That was why, although Rhine had released the venomous insects and watched them burrow into the coffin, once they entered their host's body, they lost contact with Rhine. He could only wait for the coffin dweller's energy to be devoured by the insects, causing her strength to decline or even leaving her unable to fight.
So, despite the coffin dweller's overwhelming strength at the beginning, Rhine had endured and waited at every turn, all so the venomous insects could take effect.
Once they entered her body, there was no information whatsoever. He did not even know whether they had successfully controlled her body. That was their greatest flaw.