My sister can't be Ying Li Li

He traveled through time and became Eiriri's younger brother, gaining the ability of [God of Strategy].
Each time you capture someone, copy the other person's talents. Crazy strategies to gain abilities in novels, comics, music...all fields. Even if he becomes a scumbag, it doesn't matter, as long as my sister can get rid of the fate of "golden retriever loser".
The scumbag's original wish has just begun.