Or maybe a system where for example province lords are triggered by the amount of bosses killed within that province, so lets say for example for WoomyonLord, you kill x amount of WooomaGuardians,WT's,Khazards ( obviously this is varying amounts require per province with different amount of subs/bosses but this is just a example) and then when the required number has been reached it will trigger a global saying for example WoomyonLord has awoken in a Random Woomyon Cave so could me in wt or insect cave or any floor and its up to people to send search parties for them.