I don't really remember since we talked about an in-game event, so that's why we would like to tell you what about this Zombierathon event.
The event is held by Go2Arena and it's open to everyone. You'll need a level 1 undead character on EU-Balnazzar realm. The complete instructions and details can be found on the event's official page.
Keep in mind that there are prizes involved as well, so if you want to do something different in-game you still have time to prepare for this event.
Here are some words from Matt of Guild Arena:
The Guild Arena Team is pleased to announce that the next community event will start on 23rd of March (Saturday) on EU-Balnazzar realm. The new adventure titled “Zombierathon” will consist of Undead Marathon with few rpg and riddle elements. To bring you maximum of fun and give everybody a chance to participate, Zombierathon is aimed at level 1 characters (groups of 3 players).
Rewards are awesome so don’t miss your chance to get them!
More information about Zombierathon may be found at: http://www.go2arena....ex/zombierathon
Good luck to all participants! We expect screenshots!