My Unique Skill Is Fate Gacha[DxD]

After dying twice—once as nobody, and once as humanity’s last hope—he expected, at the very least, rest. Instead, he woke up again. Now trapped in the body of Alear G. Häagenti, heir to a demonic bloodline that once stood at the pinnacle of the Underworld and now lingers on the brink of oblivion, he finds himself surrounded by silent enemies, political conspiracies, and a fate that clearly wasn’t finished with him. Fortunately—or perhaps unfortunately—he did not return empty-handed. After touching something no mage should ever reach, he awakened a unique ability tied to the very Root of existence: Fate Gacha. The only problem… it depends on “luck.” And luck has never exactly been his strong suit. — Description from novelcodex.org