Everflame Eidolon is a really awesome name, and this art is gorgeous.

But he only barely competes with Dragon Mantle, which is common, costs R, and could easily draw you into something better than a 1/1 firebreather, undermining the pseudo-card-advantage aspect of the Eidolon's bestow. And Stonewright absolutely takes him to school! I'll still throw fire all over limited with him, but I wish he brought a little more to the table.