White Sliver and the Undead King

Death Ruler and Berserker is a collaboration game event in Mass for the Dead with characters from Overlord and Youji Senki. It was released on November 8, 2019 to November 22, 2019.

Background
A summoning phenomenon caused by the stones embedded in the Throne of Kings and the stones dropped from the Chaos Beasts. In front of Momonga, who witnessed the verification experiment, six new visitors from another world appear. The Imperial 203rd Aerial Mage Battalion belonging to the Imperial Army - a military unit headed by a "little girl."

Incident
Maj. von Degurechaff and the members of the Imperial 203rd Aerial Mage Battalion are currently in the air testing out the Elenium Type 97 ‘Mobile Assault’ Operation Orb for Professor Adelheid von Schugel. During Tanya's activation of the magic equipment, her orb malfunction and it at the verge of a meltdown. Seeing her soldiers around her, she orders them to distance themselves from her to save themselves. The others are conflicted to what to do when a Rift suddenly appears and sucks the Major followed by the rest of her team into its grip.

Aftermath
To Be Added...