Mastemon

This deck can OTK with a double DNA Digivolution. A triple is also possible. First you play the BT23 version followed by the promo one. Mastemon BT23 sets both players to 3 security and also lets you play one of your Level 5 Digimon for 0 cost. If your DNA Angewomon is the one with Alliance, then you gain +1 security attack with your mastemon, so the opponent drops to 1 security. Then, if you have enough memory at least 3 before attacking to gain 1 by trashing your top security or if you have 1

This deck can OTK with a double DNA Digivolution. A triple is also possible. First you play the BT23 version followed by the promo one. Mastemon BT23 sets both players to 3 security and also lets you play one of your Level 5 Digimon for 0 cost. If your DNA Angewomon is the one with Alliance, then you gain +1 security attack with your mastemon, so the opponent drops to 1 security. Then, if you have enough memory at least 3 before attacking to gain 1 by trashing your top security or if you have 1 mirei ex6 you can do that even with 2 memory before your first attack. then hard play a Level 5 LadyDevimon or Angewomon for a cost of 4 and if you have the promo Mastemon in hand, you can DNA Digivolve and return your BT23 Mastemon to your security stack, giving a total of 2 recovery. But that part doesn’t really matter, since the important effect is that it lets you trash the last card of your opponent’s security, allowing you to attack directly for game if they don’t have a blocker. Otherwise, it’s better to clear their board. If Ordinemon is in your hand, you can go for a triple DNA Digivolution to clear the board, even if it leaves them at 1 security.

If your opponent has a Digimon with Blocker, you first use your Mastemon BT23 effect to place that Digimon into their security. Then you attack with Alliance to leave them at 2 security. After that, you proceed as in the other line: you play the missing Level 5 needed for DNA Digivolution and then play the Promo Mastemon for +1 recovery. Next, you activate its second effect: you trash your own security to play a Digimon with 6000 DP or less. Then you use its first effect, but instead of returning your BT23 Mastemon, you return the Digimon you just played. Then you trash their security, leaving them at 1 security. After that, you attack to remove the last security. If you have Ordinemon in hand, you can DNA Digivolve and attack.

Originally, it is not guaranteed that Ordinemon is used specifically for this line, since it is mainly used to clear a board, similar to Boltboutamon, which you can play instead. However, the combo is so strong that depending on the opponent’s deck, it can simply result in an OTK.