The elves' ancient texts had written everything about the orcs.
Apparently, the green creatures were a product created by the elves as a way to fight against the human race. From what the elder explained to him, it was the combined genetics of the elves and certain unique plants that were able to create thas new species called orcs.
After thousands of years, the orcs' genetics had begun to improve, and they appeared to be able to evolve into a race that went beyond their creators' intentions, with minds of their own and culture.
The once perfect species for war have started to have their own civilization. And it was because of this that ultimately began a debate between the Dark Elves and the Wood Elves.