The encyclopedia of the Hungry Joker series by Yūki Tabata which started serialization in the Weekly Shōnen Jump magazine since November, 2012 and ended in May, 2013. The Wiki's main task is to progressively collect and archiving all Hungry Joker related materials into exclusive pages. Currently, we have edited over 79 articles as of May, 2013!
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WARNING! This wiki contains spoilers. Read at your own risk!
Eureka (エウレカ, Eureka) (Greek: εύρηκα, heúrēka; Literally meaning: "I have found") is a term given to a series of supernatural items that each of these items contains explicit knowledge of the human world. These particular items are considered to be beings close to that of a sentient as they are able to choose their own users, people who is known as the Chosen One (選ばれた人間, Eraba Reta Ningen).
Again... Spoiler alert! Read at your own risk!
Please do not assume that this is a correct translation until further notice.
The fight between Heidi and the mysterious person begins with the latter uses the harpy against Heidi. Later on, the mysterious person reveals the secret of his method of transforming humans into monsters by showing Heidi a series of pea pods, which he called Eureka.
He then uses it at himself, turning him into a winged-like figure. As they fight, the masked figure starts to gain an advantage. Fortunately, Heidi manages to escape after he is able to deliver a single punch that breaks the mysterious person's mask. As the scientist and his companion leave, a womanly figure appears. Calling the mysterious person as Killed, she reminds him that it is time for their dinner party.