Undead God: I Can Extract Everything

【You have used your Talent 【Extraction】 on a corpse, successfully extracting 0.1 Attack attribute points from the target】
【You meet the conditions, you can add the extracted attribute points to your Skeleton servant！】
【The strength and quality of your servant has been enhanced！】
……
This is a story of a transmigrator who, aided by his game cheats, becomes a Wraith necromancer in a world invaded by a game！