Probably just mix a water-related word with something like Aqua, Tidal, Wave, Marine, Frost, Flood, Oceanic, Stream, Hurricane, Drowned, Surge, Riptide, Torrent, etc.
Inversion of gravity? As in inverting the direction of gravity, making things move in unexpected ways. Or maybe something like gravitational lensing. They can bend electromagnetic waves, perhaps making themselves invisible or creating illusions or distorted realities.