He lets go of his thoughts and jumps into it feet first. It is opaque and gooey, but he can move around in it. He floats through an icy corridor, being pulled by some unknown force. He comes out at Lake Teresa. He floats slowly above the lake.
People are on the shore and out in boats.
Everything looks normal. He circles Lake Teresa several times before he sees it, nada. That is the best name for it, nada. It is an energy vacuum. The City of Twelve will be totally destroyed, nothing left but a large, empty space, a nada.