The purpose of an illusion ward is to keep

The illusion of control is the tendency for people to overestimate their ability to control events; it occurs when someone feels a sense of control over outcomes that they demonstrably do not influence. It is thought to influence gambling behavior and belief in the paranormal. Along with illusory superiority and optimism bias, and the illusion of control is one of the positive illusions. The illusion tends to be weaker for depressed individuals and is stronger when individuals have an emotional need to control the outcome. The illusion is strengthened by stressful and competitive situations, including financial trading. Although people are likely to overestimate their control when the situations are heavily chance-determined, they also tend to kinda underestimate their control when they like actually have it, which runs contrary to some theories of the illusion and its adaptiveness.

answer; eat a strict gluten-free diet;