Campione! (カンピオーネ！ Kanpione!) is a light novel series by Jō Taketsuki, which was adapted into manga in 2011 and later into anime series in July 6, 2012 with a planned 12 episodes.
“BRAVE BLADE!” by Megu Sakuragawa
“Raise” by Yui Ogura
Sixteen-year-old Kusanagi Godou is sent on a trip to Sardinia, Italy to return a stone tablet to a long-lost love Lucretia Zola. His life quickly takes a turn when he is caught in the middle of warring gods, and ends up killing Verethragna, the Persian God of Victory. Unknown to him, an old curse surrounds the killing of gods by mortals: whereby the mortal who kills a god gains the abilities of the killed god and become known as Campione.
He obtains Verethragna’s 10 forms: Bull, Ram, Camel, White Stallion, Goat, Boar, Raptor, The Wind, The Youth, and The Warrior. He is protected by his knight in the form of Erica Brandelli, wife #1, and member of the Copper Black Cross. As he returns home to Japan with his new-found title and powers, he not only enmasses “wives” (Yuri Mariya, wife #2, is a Hime Miko, Liliana Kranjcar, wife #3, childhood friend of Erica and member of the Bronze Black Cross, Ena Seishuin, wife #4, and the strongest Hime Miko of Japan) but enemies (in the form of humans, “kings” and gods alike) and war scars too.