[Hiccup makes a waving gesture at the sky.]

Those flying spirits? They've been messing with our heads. One got a little too close to you before Toothless drove it off.

Long story short, the attack we were warned about? It's happening now. Two groups are trying to drag us back to their leaders. Teleporting wizards on one side, cloaked swordsmen and spirits on the other. They're not exactly happy to see each other or us.