Having played with the rats i know that some of there strengths is in there interesting magic with that in mind i couldnt just give my grey seer just any old spells so i decided to make my own the first of which is as follows:
Skitterleap
Magic Recharge
<p> 4
Special: 5 power, add if engaged
*S* With an Audible 'Bamf!' the caster disappears and reappears at any point within long range and within line of sight.
*SS* Same as above, but can target anyone friendly unit within close range even if they are engaged.
*B* After Reappearing you may immediately preform a manoeuvre for free.
{B} Caster suffers 1 wound
{S} The capricious Winds of Magic whisk you away, at the end of your turn you Reappear somewhere within close range of destination( players choose where)
Now I know that this looks very similar to a spell already made which is true however i modified it a bit to fit the skaven theme a little bit. As always i offer this up to the masses to tear to shreds and offer opinions upon.