Even though it is not easy to achieve all the conditions to use "All Delete", it is not impossible.
We need to return 1 Omegamon to hand in order to play the "All Delete" option card, and since you may not have enough memory, then you need to use "Mega Digimon Fusion" to reduce the cost of digivolving from your LV6 digimon to LV7 digimon, hence you also need a white option card in the board. The All Delete card can wipe out all Digimon and Tamers, leaving the delay option card and Digimon in the raising area. If your opponent has 2 cards in his deck, assuming he returned 2 Omegamon Zwart at the end of the loop procedure and no Digimon in the raising area, he will surely lose in the next turn. He cannot evolve his egg because he has to draw, but if he does not digivolve, he dont have Digimon to attack you to end the game.
The second method happens to be in Green color.