Congratulations! Lina and Momonga!

'''Congratulations! Lina and Momonga!''' (祝邂逅！リナとモモンガ！) is a collaboration game event in Mass for the Dead with characters from Overlord and Slayers. It was released on June 15, 2020 to July 15, 2020.

Background
Luminance between the thrones and regular summoning experiments using using Chaos Stones. This time, three mages and one swordsman emerged from another world. One of them, the self-proclaimed "Magical Genius," seems to be powerfulFearless, lightning, and victory is not for whom.

Incident
At might, in the mountains near a post town, screams can be heard from a bandit hideout. The bandits are under attack by an unknown assailant who is throwing out [Fireball]s upon them. The bandit chief coming before their attacker, demands to know why they are being attacked. Their attacker takes the opportunity for a conversation stating that its ironic coming from people who rib merchants on the highway, kidnap daughters of nobles, and raid towns to ask why. The bandit chief thinks that the townsfolk hired them. To his shock their attacker states that this is a hobby for her, and he realizes that she is Lina Inverse, the "Bandit Killer." Lina then proceeds to cast another [Fireball] and eliminates the bandit, though she is disappointed that her infamy doesn't account for her being a "Magical Genius", but takes solace that she did a good deed. Her companions, Amelia Wil Tesla Saillune and Zelgadiss Graywords state that killing bandits and stealing their loot shouldn't qualify as a good deed. Gourry Gabriev compains that Lina made them come here all the way out from the inn they were staying. Lina is annoyed by her companions beration, stating no one asked them to come, however her ire is redirected when the bandit chief, who survived her spell, makes a comment on her flat chest. Annoyed the mage then begins to cast [Dragon Slave] much to the others horror and obliterates the bandit. Amelia chides her for using such magic, but Lina states that the bandit had it coming and the the spell wasn't at full strength to avoid damaging the treasure. Zelgadiss wonders if any of the treasure may contain a Philosopher's Stone. Lina doubts that the bandits would be able to handle such a treasure, and just as she goes on a Crack appear behind her. It the proceeds to suck Lina, Gourry, Amelia and Zelgadiss.

The group eventually land on a carpeted floor surrounded by undead. They are greeted by a being known as Momonga, the ruler of the Great Tomb of Nazarick. The undead then goes on to explain that the four have been transported to another world Though initially shocked by the situation, the group remember the Crack that sucked them in and Lina mentions that existence of other worlds is possible due to the Sea of Chaos. Momonga is relieved that the group have it easier in accepting to be in another world. Lina however is wary of Momomonga, believing him to be some kind of Demon King. While she never heard of his name before, her experience with Fibrizo causes to act with caution.Before Momonga can explain their situation, Lina attacks him with a [Burst Rondo]. The attack fails as it is blocked by a Death Knight, so Lina casts [Raywing] to fly in the air with her companions and escape the room. Momonga interested that the spell she used was similar to [Fly] and not associated with Tier Magic, decides to allow the undead guards outside the Throne Room handle the visitors.

Outside the group land in the Lemegeton where they encounter a horde of undead monsters standing guard. Lina tells her friends to prepare to fight their way out which Gourry, initially shocked by the suddenly escape, happliy prepares to use Gorun Nova and fight.

The party manages to make it to the Amphitheater on the 6th Floor, finding very little resistance by the undead horde. They are greeted by two dark elves, and while their appearance are seemingly innocent, Lina's party suspect that is not the case. Lina attempts to ask the children if they could allow them to pas, but are refused, and the two groups end in conflict. One of the elves immobilizes Zelgadiss, by striking his shadow with an arrow. Lina seeing this is similiar to [Shadow Snap] attempts to free her comrade by using [Lighting], but is distracted when she almost ensnared by vines produced by the other elf. Lina sensing that the elves and almost all their attackers have been withholding from harming them, decides to surrender. The elf states that is the best outcome as they were given orders not to harm the group, in fact their master is hoping they could be clients. Confused the group are interrupted when the Floor Guardians arrive at the area. Momonga order Aura to release Zelgadiss which she complies. The undead highlights that they wish to not harm them and wants to establish a dialogue, though Lina states that they are not going to get along.

Some time later, Lina and Momonga quickly bond over their interest in magic, comparing them spells used by her and that of Tier Magic. She also takes an interest in Momonga’s thumb ring. Zelgadiss Watching this is aghast of the disappearance of all hostility. He soon sees others in his group like Gourry bonding with a fellow warrior, Cocytus and the justice oriented Amelia forming a friendship with Sebas Tian. Not all is well as Albedo grows jealous of the closeness Lina has with Momonga. Shalltear Bloodfallen doesn’t seem to mind, which causes the Overseer Guardian to a accuse her of sympathizing with Lina as they Have the same flat chest. This invokes anger from both women.

After exchanging information, Lina and his friends were sent to the guest house on the 9th floor as a living base for a while. All the members of the group, save Zelgadiss find the inhabitants to be agreeable, especially Lina. Zelgadiss accurately deduces that the mage is aiming to collect some valuables from Momonga. Lina defends her greed stating that maybe one of Momonga’s items could restore Zelgadiss‘s body. Zelgadiss still thinks they should be on guard, however his concerns are ignored as everyone decides to find food. His words falling to deaf ears, the man decides to join them.

Aftermath
To Be Added...