Worldwide Monster Hordes
The world has changed in such a fast pace that the players could not adapt immediately. The sudden emergence of the field bosses and even some dungeon bosses created total chaos. Lots of territories immediately became alerted to the fullest as unprecedented monster hordes happened.
All of the lords from each continent as it was not only the central continent that was affected. All of the continents are affected by what the people will call the Monster Horde Armageddon. It is not just the boss type monsters that were empowered but also the weaker monsters that usually die in a minute against player attacks.
The monsters became rabid and fierce that all of the players could no longer recognize the monsters that they easily defeated before. The power of the monsters increased by half which meant that they have increased by twenty levels or so. The power that these monsters exerted not only increased but also their lethality.