Q's "arrow [in a quiver]" is probably related to Pelosi's threat to impeach POTUS.

>“We have our options. We have arrows in our quiver that I’m not about to discuss right now, but the fact is we have a big challenge in our country,” Pelosi said. “This president has threatened to not even accept the results of the election.”

https://www.foxnews.com/politics/pelosi-no-trump-impeachment-scotus