"I feel like I am playing pokemon. Go…" Billy thought while he was flying around.
The third spirit that he found assumed the shape of a mole, and it didn't cause him trouble and began to work with Billy. Now thanks to it, Billy could enhance his attacks and defense. In any case, based on what he had heard, most of the tribesmen had the spirits of either fire, water, wind, or earth. Now, Billy just needed the wind to complete the basic deck. It would be nice if he could combine their abilities, but that probably would be too overpowered.
After that, there were the ultra rare. It was said that only one person every one hundred years could find a spirit of dark and light… Billy wondered why existed only six… Ice and lightning magic is a thing, so why doesn't the spirit evolve into those elements? Finding a Thunder spirit would be hard, though. They most likely would live in Thunder clouds like Zapdos.