What’s the best way to incorporate MTG into D&D?

I started playing AD&D when it came out in the seventies. I have all of the 1st edition Core books including Deities & Demigods with Melnibonéan and Cthulhu mythos. I have about 100 Modules as well as some Gamma World and Star Frontiers. I started playing Magic the Gathering in 1993 and have about 15,000 cards. There are a lot of creatures as well as characters that I would like to incorporate into some D&D dungeons, but not exactly sure how to make the transition from Magic’s Attack/Defense to D&D’s AC/HP or specific DAM. Any suggestions where to start, other than just doing a comparison from a MTG creature/character to something from D&D?