Undine’s Spring



Undine’s Spring (ウンディーネの泉, Undīne no Izumi), also known as Taboo Spring (禁忌の泉, Kinki no Izumi), is a location in Monster Girl Quest!. It’s the domain of slimes, the home of the Water Spirit Undine and the birthplace of the Heavenly Knight Erubetie.

Description
Despite being called a spring, it stretches for kilometres and it’s one of the few unpolluted areas in Ilias’s world, also being free from human settlement. Due to these factors, slimes congregate here as low-grade slime monsters can only live in unpolluted places with a pure water source.

On the surface, the area is a large serene lake surrounded by plant life. However, setting foot into the lake warps one to a linear subterranean cave system which is where the slime population live.

History
Luka and Alice arrive at the spring so that the former can make a contract with Undine. From within the spring, Erubetie calls out to discourage Luka from entering. He enters regardless.

Through the cave, Luka fights a group of slimes, starting with Jelly Girl, then Blob Girl, then the Green Slime, the Blue Slime, the Red Slime, and the Purple Slime, only to be met by Erubetie after he’s found “invading their home”. Erubetie proceeds to attack Luka and almost kill him, only for Undine to come to his rescue. Erubetie decides to leave and let Undine deal with the human. Undine tests Luka by requesting that he use Sylph and Gnome at the same time. When Luka eventually succeeds, she grants him her power. Later during the invasion, Luka and Alice visits this place to make contract with Salamander but a new slime like monster called Slime Bess has poisoned the Spring with Magic Mercury and putting all the humans and slimes in danger, Erubetie wants to know why Slime Bess is betraying her own kind. Slime Bess claims that she will replace Erubetie as the new Slime Queen and was ordered by Black Alice to attack this place. After Slime Bess as defeated, Amphisbaena arrives to kill Erubetie but Luka barely saves Erubetie from being killed. Erubetie asked Luka why he saved her while Amphisbaena tells Erubetie she should be glad that he saved her or she would have been killed by her attack. Erubetie tries to attack her but she is immune specially against Slime using Sound attacks and using Vibration Armor to protect herself against Slime Attacks. Then later an Angel named Throne Eggiel was commanded to prevent Luka from making contract with Salamander. She was also defeated while Amphisbaena was annoyed that Throne Eggiel couldn't defeat the Hero long enough to kill Erubetie herself. Luka later meets Salamander again but she is weakened by her opposite element which is water. After the contract Erubetie evacuated the people and her kind to Plansect Village.