Would be a cool Rift Mage ability, teleporting around the battlefield
Oh my gosh, totally! I still have lots of uncertainty as to what the heck a rift mage is and why it's so different from any old mage who draws upon the Fade, but if that would fit into existing lore that'd be badass.
I looked at it and what Vivienne didnt seem quite the same as what the enemy mage did, but I hope it is,
Yep, they're definitely different animations and visual effects. And Vivienne's range seemed to be much more limited. (Or perhaps she just hadn't invested as much into that particular skill!)
that mage totally turned into something there.
Looking again, I think you're right. And I think that's a very spiffy visual effect! Like the Death Eaters from the HP movies when they Apparated, only more natural-looking. (Does it make sense to talk about how "natural" it looks for someone to ripple into a different shape and fly to another location in a split second...?
)