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Ever since there has been confirmed news that the art of hero summoning could once again be performed, the attention of the people of Edea have been focused on news from the Zweifel kingdom. The last hero; who was known to be the greatest mage had been responsible for centuries worth of peace between the races.
The hero Natsu, dubbed by the church as 'Uriel' had hidden the most important parts of the spell to summon heroes because he had judged that there shouldn't be any threat to the peace he had been responsible for as long as his deal with the Demon Lord had never been broken.
However, at present, the current heads of the Zweifel kingdom along with the upper echelons of the church of light had come to an agreement to perform the hero summoning ritual. They had spent several years researching and uncovering the parts that the hero Natsu had hidden.