Related to magic, but unrelated to much else. I went out and tried the MCrit Atmas tonight just to eyeball them and make my testing of Goetia Gloves +2 a little faster. They're nothing special at all. I went 8/30 MCrits with both on, Hecate's, Wise Strap, and AF3+2 BLM gloves. Far from conclusive, but they're probably more on the order of 10% each than anything else. Unless there's an absurdly low MCrit rate cap, anyway.