An Unknown Cheat or I dunno

Let's admit, almost all people that gets to be reincarnated acquire some sort of cheat. This story is quite a bit different. A certain orphan gets reincarnated into another world, and he only knew a few years later that he doesn't have a "source spirit" which is a requirement for sentient beings to gather source energy and have magical powers. Later on, he swallowed a box which contained a rather uncommon fruit, and this only added on to his worries... Follow Kaff Eric on his journey as he travels around the new world that he transmigrated in.