The World of Blood Legacy was an event in Seraph of the End: Bloody Blades, held from September 28 to October 21, 2015. It was the very first event of the game to commemorate its release on September 28, 2015.
Players were required to clear the three stages featured in the event map in order to stand a chance of getting a copy of SSR Ferid Bathory as a drop reward. Additionally, by clearing the third stage of the event, successfully getting a 3-star evaluation ranking will guarantee players a copy of SSR Ferid Bathory
- The plot of the event story is the same as the events from anime episode and manga chapter of the same title.
- During this event, the "Supreme Ruler of the Abyss" and "The Queen's Advent" events were also held concurrently.