The Immortal Upgrade: Power Beyond Measure

After transmigrating into a lowly servant at Kelton's alchemy workshop, Ethan Carter spends his days cleaning herbs and discarding failed pills. With a useless mixed spiritual root, he thinks immortality is impossible—until he unlocks an unlimited fusion system. Any item can be upgraded through synthesis. Trash pills become treasures, weak skills become legendary arts, and ordinary fruits become ancient wonders.