in Dark Time where Harry Potter and Dougley are suppose to go through the tunnel, but Dougley will not move from the fence and you cannot kill the reapers. What do I do? Is there a way to kill the reapers?
Switch the spell over to the white marker on the left-side of the wheel. It's the one intended for the dementors. If you've seen the film series, this spell should have a familiar look and sound to it.
Continue blasting away at these fiends and eventually the story will progress from there. I'd hate to spoil what happens, but your mission is to try and protect Dudley from whatever harm may fall upon him.