Viral
This modification introduces a dangerous virus called "Viral" into the Minecraft world that can actively spread between different mobs.

The infection's distinguishing feature is its different effects on various creatures. Hostile mobs, when infected by the virus, receive significant enhancements and become more dangerous, making survival in familiar locations considerably more challenging. At the same time, peaceful animals bear the brunt of the disease - the virus causes them serious harm, threatening both domestic livestock populations and wild animals.
The spreading mechanics are built in such a way that infection can pass from one creature to another, creating entire chains of contagion. To combat the epidemic, developers have added special tools and items that allow players to control the infection rate and minimize losses.