And so, the cyber war between Isis and Anonymous rages on. After shutting down over 5000 of the militant group's social media accounts, and publishing a handy “how to” hacking guide against them, Anonymous are well into the midst of their “biggest” ever terrorist takedown. The online activists are apparently more determined than ever to destroy Isis – and now, they may have just unleashed their most powerful weapon yet.

According to a recent tweet from the #OpParis account, Anonymous are now flooding all pro-Isis hashtags with “Rick Roll” videos. That means; whenever any Isis account tries to spread a message, or get something trending, the topic will instead be flooded with countless videos of Rick Astley circa 1987.