A datapack that gives the villager 10% chance of having an ability.
If you kill a villager who has an ability you can collect his brain.
Heroes Villager v1.2:
If you have a replication ability and you are close to a villager with an ability, then a sound and a visual signal indicates the villager. 
A datapack to help solo players who are lucky enough to have a replication power.
This datapack need NBC Heroes addon to work.