Wizard: Beginning with Greedy Absorption

[Transmigrating into a wizard world + greedy golden finger + ruthless power fantasy + multiple heroines] Aaron, a leading researcher, transmigrates into the crumbling Iron Age of wizardry and finds himself inhabiting a low-level apprentice who was just murdered by his mentor! Fortunately, he comes with the Book of Soulful Greed! Kill a supernatural creature, and he can activate its greedy absorption: strip away spell models, seize combat techniques, devour talents and abilities, and even harvest the target’s obsessions and concepts! He turns the tables on his vicious mentor, absorbs his core spells, poses as a genius to enter the Academy of Truth, hunts in secret, and tramples noble-born prodigies underfoot! He infiltrates the Shadow Council, outmaneuvers the schemers at their own game, wins over a dangerous, mature dark witch, and rescues a cursed female knight! He stokes war across the continent, annexes factions, wins the kingdom’s queen, and establishes a Ghost Council of his own! When soul shepherds from another world arrive and reveal the truth that “all wizards are livestock,” Aaron takes up his butcher’s blade, devours the souls of otherworldly powerhouses, and kindles divine fire! From lowly apprentice to the world’s one and only true god, he claws his way back from hell to claim the throne reserved for the greedy! [Ruthless and decisive, never a saint｜A satisfying payoff every three chapters, a major one every ten｜Multiple heroines fighting by his side｜Vast worldbuilding]