The Artifact uses "Type A" X-Acto blades. So the shank holder will fit #10, 11, 12, 16, and 17. I've tested it with most of those, and it closes perfectly on #11s (which is the blade style it comes with) and #16s, the scoring blade. #10s, the deep-bellied general purpose blade, will usually work but bottom out slightly on my particular Artifact on closing. It will not close on the #17 chisel blade, and I haven't ran across the #12 mini-carver to try it out but I think it would probably work OK. The Artifact shank holder is more sensitive to thickness than a real X-Acto, so some other brand of hobby blades that should fit won't. In particular, Model Master #11 style blades were too thick to even fit in it.
Unfortunately the cool hawk-bill concave carving blade is for a different shank type.