Could this BOLS commenter be talking about my Storm Serpent?
"The Storm Serpent is based on an Epic scale Eldar super heavy tank. Basically its the same chassis as above with limited weaponry but has a webway portal built onto it. So you can bring Wraithlords and Vypers through it. If I remember right its as if they walked onto the board, so they can assault the turn they come in.
Anyway its a datasheet that won a bunch of contests and its pretty sweet, I would make one if they had a plastic kit."
There also seem to be rumors about a plastic Scorpion...