Minecraft wiki entry for Superflat_survival, associated text: Zombie villagers spawn occasionally instead of regular zombies. You need a witch to cure a zombie villager. Lure a zombie villager over to a witch, and the witch can throw a splash potion of weakness at you. Make sure the witch throws a splash potion of weakness to the zombie villager or near them, so that the zombie villager gets the weakness status effect. Quickly feed the zombie villager with a golden apple. Kill the witch. Trap the zombie villager to make sure it doesn't die before turning into a villager.