You loosen the fabric of the weave around you momentarily, preparing it for greater manipulation. The next spell you cast before the end of your turn tears and tangles with the weave, forcing a Wild Magic Surge to happen.

At Higher Levels: At higher levels, you can roll additional times on the Wild Magic table and choose one of the results, 2 at 3rd, 3 at 5th, 4 at 7th, and 5 at 9th