I might not be a shining light on either game, but I can navigate MtG's layer system, and I'm a follower of, though not a major contributer to, D&D TO. I'm also active in the MtG "You Make the Card" forum, with good, but not stellar, results (my cards tend to lose points for being boring, straightforward, and/or conservatively costed, which is a rarity in my experience). If you need another rules junkie, just PM me. I'd love to help you out.