It wasn't a GW original, i think i found it at a skaven fan's site.
But the new and improved pic looks great!
About the Grey Seer, there are two spells that i have found that would be awesome if animated:
Warplightning and
Vermintide
Warplightning is obvious - a huge bolt of green tinted lightning flying from the end of the Seer's staff.
Vermintide is a huge swarm of rats summoned by the Seer, so it would be similar to the Bray-Shaman's "magic wood pieces" attack. i imagine the attack as a hole opening in the ground in front of the Seer, then hundreds of rats pouring out of the opening
I would suggest that the vermintide be attack A, and the warplightning be attack B, if aaglo is willing to do both of them
And i think that the Grey Seers should have horns. it is what distinguishs them from the regular skaven. having horns means being blessed by the Horned Rat
Yay, aaglo is back making skaven.
ps. I think he loves skaven now, he just won't admit to it

