Why did the plague legend catch Hugo?

According to Zhihu's query, in the game "The Legend of Plague", Hugo's special ability comes from a strange substance called "PrimaMacula". This ability enables him to communicate with mice and control them to attack the enemy. More specifically, when the player uses Hugo's ability, he can scan the enemy's position and manipulate the mouse to actively attack and drown the enemy with a strange agility and perspective. Because his ability has attracted the attention and desire of others, they hope to gain this powerful power by controlling Hugo.