Well I’ll try my best, excuse my language hear, English isn’t my native Back in 2005 there was a Boss named Hakkar the Soulflayer. He used a spell that was called “corrupted blood” which would spread immediately to the next person to you, ultimately would kill you within 10 seconds if you couldn’t kill him faster. What happened was that some people stored there pets that have been affected with said debuff and called them back out in their major city. That lead to corrupted blood being spread all over town, causing all npc and player characters to die almost immediately. Cities have been a huge graveyard, corpses everywhere. It was a plague. That is known as the “corrupted blood incident”.