Alex, a mercenary, made a really suspicious contract with an unknow entity while DRUNK. "What have I made?" "I don't know, probably nothing." The thing is: Alex  got his hands into a skill that allows him to open gates that transports him into other dimensions! Let's force modernity into magical worlds, then learn magic and force it into an advanced world, take their tech, hibridize with magic, and make tons of money?! Who never thought about selling cheap saturated-fat products to medieval societies in exchange for gold?