Summoners War: Cross is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Durand and his best friend Elheil continue to train to become a summoner in a village in Eteca, where peace has been precariously kept during the Hundred Years’ War. One day, Durand loses his father to the shadow organization, chasing the ancient relic ‘Shelkrino’, and Durand pursues the shadow organization in his own way to get revenge and Elheil pursues to uncover the identity of Shelkrino. Elheil and his crew who became Durand’s family worry about Durand who wakens his summoner’s ability due to Shelkrino but also is being eaten away by it. Will they succeed in avenging Tomas and stop the shadow organization from threatening the entire Alea?