Not the weirdest suggestion I've ever heard! [As soon as he disentangles the vine from his ankles, he's back on his feet, slashing at the few tendrils persistently reaching for him. He can't keep this up forever and a sharp glance around him tells him the rest of them can't either.
Percy throws out a hand in the direction of the nearby lake and it immediately responds. A tall, moving wall of water bursts in to encircle their group, moving at a speed rapid enough to disintegrate and repel the vines, leaving something of a safe zone for now.
He makes an opening in the wall of water, opposite of where the vines are coming from.]
Move closer to the lake! Create some distance! [he shouts over the sound of swirling water. He's concentrating more than usual, sweat beading his forehead as the effort to keep up the protective barrier drains at his energy. His powers have never sapped at him like this before. It had to be the prison. That and his weakened stamina from his venture through Tartarus.]