Notice the aether when casting Jolt, Impact, Scatter, and Tether. It's a red-pink glow. Compare to Veraero/stone which is a blueish/white glow, and Verfire/thunder which is purple with black mist.

I suspect that while Ver spells are white or black, but the ones with the pink aura are mixed. Jolt might be a mix of Fire/Wind or something, for example (I don't know if they have to be mixed elements, but the spells are definitely combos of white and black, given their auras)