((Hey LeeGraw,
Since's it's the Witches Season, I figured a little bit of zombie-thread revival would be okay.
Anyway, you know... I think you can move any number of times using the Shadow Lore Attribute, as long as you're within 18" of a matching character, and the spell is cast.
Something I've been doing lately with my Shadow Sorceress...
I'll keep her with her Archer Escort Unit behind my main infantry block, but within 18" of my Warrior Priest. She'll cast a minor-ish hex or whatnot... and swap with the Warrior Priestess in said infantry block, putting the mage into the melee unit. Then she goes off with her zorch spell or super-hex, or Pendulum of Death... and swaps places again with the Warrior Priestess. Putting the mage back with her Archers, and the Warrior Priestess back into the front lines.
It doesn't always work, as sometimes the spells are countered and stuff, but it is worth the "Did... she just move her mage into combat" look on their faces, as they're never quite sure what you are going to do next... especially when you have both the Pendulum and Pit of Shades. And... it also lets you get a spot better range, as Shadow spells are on the shorter-side for casting.))