Runeterra: Crossing Comes with the Ultimate Grimoire!

Yan Chuan was originally a otaku in front of the computer. When he woke up, he traveled to Runeterra and brought with him a system called the Ultimate Grimoire! I want all the minor skills, ultimate skills, and your hero himself! Looking at the Rune Continent that was in constant turmoil due to the ruined King Foyego, Yan Chuan decided to step forward to save thousands of heroines from fire and water, and support their waists from danger! Lucian: What? My wife Senna just came out from Thresh and ran off with some bastard. Senna: Yan Chuan is much more powerful than Lucian's toy pistol Ai Xi; When will brother Yan Chuan come today? I've had enough of that barbarian's five seconds. Good Luck Sister; the only one who can become the Pirate King with me is that man. Piano Girl: When will the brother who taught me how to play the piano come back? All skills can be integrated and upgraded under the magic book system! Yan Chuan looked at the countless beautiful figures lying down next to him, and thought to himself: Valoran, I am determined to save you! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.