I Have a Game Development Tool in the Apocalypse

A 17-year-old high school student and gaming nerd, he possesses the unique talent [Imagination Made Manifest]. It allows him to briefly bring into reality "game settings" that he deeply understands and believes in, including skills, equipment, items, and even temporary changes to local rules. The ability's strength is directly tied to his mental power, depth of understanding, and strength of belief. It has immense potential, but also significant limitations.