In an amazing new mod for The Witcher 3: Wild Hunt, mod-maker has created a new “Infection Mode” that, when activated, spawns a Necrophage 6 levels higher than you are at the time.
The spawned necrophage will ignore the player for 10 seconds, during which time it will attack any nearby NPCs. NPCs react to the necrophage much like you would expect, running away, screaming, or sometimes fighting the necrophage (but usually losing).
And, perhaps best of all, every NPC touched by the necrophage turns into one, like a spreading infection. So, if you unleash this mod, be prepared to deal with en entire town of necrophages after a short period. There is a user-defined limit to how many “zombies” are created.
Which necrophages can you expect to see? Apparently, all adult men and women will change into rotfiends or devourers (10% chance) that are 5 level above player. Little girls turn into nekkers, and little boys turn into nekker warriors. Wow.
Check out the info on this mod at Nexus Mods.