Eisenwald

Eisenwald (アイゼンヴァルト Aizenvaruto 鉄の森 lit. Iron Forest) is a former Dark Guild that was once specialized in assassinations.

Location and Building
The guild is located somewhere in or near Oshibana Town. The guild's building is a moderately sized building made of stone surrounded by a forest of dead trees. The only portion of the guild's interior shown was a long corridor with some paintings on the wall.

History
As the Magic Council prohibits mages from taking assassination requests, the guild is ousted from the Mage Guild League six years ago and it is categorized as a Dark Guild. So, Eisenwald's master is arrested and the guild is ordered to disband themselves. But, the members still keep on functioning regardlessly as they ignore the order. It is later revealed at the beginning of the Oración Seis arc that Eisenwald is actually one of the subordinate guilds to Oración Seis, which is one of the members of the powerful Balam Alliance.

Goal
As revenge for "locking them up in the darkness" and taking away their lives, Eisenwald tried to assassinate the Guild Masters of the nearby legal guilds while they were having their regular meeting. They attempted to do so through the use of a Magic flute called Lullaby. Which is a demon created by the Dark Mage Zeref. Their plan is thwarted by a few Mages from Fairy Tail, and the guild is defeated.

Strength
Eisenwald is a guild that specializes in assasination requests, despite this, there seem to be few Mages with notable strength within the guild. The vast majority of the members were defeated by Erza Scarlet with ease. Eisenwald's strongest member, Erigor, specializes in the usage of Wind Magic and was able to maintain the upper hand in his fight with Natsu Dragneel, however, Natsu ended up victorious.

Major Battles

 * Rune Knights vs. Eisenwald
 * Erza Scarlet & Lucy Heartfilia vs. Eisenwald Guild Members