Mastemon deck by Alec of Team APS! Typical combo looks like: have a Gatomon with Ignitemon/Candlemon underneath and Mirei on the field, digivolve Gatomon into LadyDevimon/Angewomon, suspend Mirei to play the other. DNA digivolve into Mastemon, and then through it or Angewomon, get Lucemon: Chaos Mode into your security so it can be played via Mastemon's effect. Lucemon can digivolve into Ophanimon: Falldown Mode. You've now deleted a digimon or two via their effects, and can then dna digivolve into Ordinemon to keep it going, giving yourself a lot of tempo and control in the process.
