Minecraft wiki entry for Defeating_a_woodland_mansion, associated text: Do this to every evoker until all the evokers in the mansion is dead, then you can take any vindicators you see in the mansion. Don't worry too much about vindicators killing your sheep, since they will attack you instead of the sheep. Make sure you know where your sheep is before you die in case if you die it wanders out of the mansion or it gets lost in a corridor.