There's Billions of Things Wrong with This Elven World

The world of elves has officially entered a new era. For Ye Liang, a time traveler, this elven world has become extremely strange. … Here, unless there are special circumstances, each trainer can only have six elves in his life, the only exclusive elf, and five auxiliary elves. Here, there are two ways for elves to evolve: 1. Natural evolution. 2. Use attribute evolution stones to grow and evolve through an instrument called the Elf Combat Instrument. Here, the exclusive elves can also evolve into various combat forms based on different auxiliary combat elves...