Neat shading, snazzy smoke effect, and one of the most legit-looking Winged Older Spike(C) designs I've ever stumbled across. His re-muzzled mug's especially improved, and still seems like a (super)natural progression from that chunky little page seen onscreen. Rarity, for her part, actually seems more evenly-proportioned than usual (anatomy ain't exactly FiM's first priority). Methinks that 'neck thing' mentioned above is due to the upper right line sorta confusing where it ends and her head/face begin, but I'd still call this piece a fine return to the saddle.
Apologies for the confusion. I was referring to (a) QT's possibly giving this Spike design further vector treatment, and (b) QT's Spike-descendant OC, whose vital stats can be found here: [link] Said character also appears in a 2-part fanfic 'penned' by our host: [link] & [link]