I wached it back in 2009/2010 I think.

It starts with children playing in a park or something, then one of the kids finds a cave and goes in it. There, 2 other kids follow him and they find what looks to be a dead alien/monster of some sort with wings. Then one of the kids touch it or something and he gets some sort of “plague”, where his eyes turn black. The next scene is a few years later.. I also remember that somewhere in the movie, there was a large building and 2 people were running from something in a crop field, being chased by lights. I would really appreciate if anyone finds/tells me the name of this movie from my crappy explanations :3