Unfortunately, the Digimon Card Game official rules dont support matches with more than two players
With your plan to win so quickly you really don't need to have stuff off the board for long to get your win
The classic untap all my stuff combo is Dramatic Reversal and Isochron Scepter, but Aphetto Alchemist + Illusionist's Bracers will also tap and untap an artifact infinitely
Combined with Merlins Tower , you can accelerate your mana or even cast Arcane Barrage underground
Each player puts all artifact, creature, and land cards revealed this way onto the battlefield, then does the same for enchantment cards, then puts all cards revealed this way that weren't put onto the battlefield on the bottom of his or her library.) Stitcher's Graft: Has a couple of downsides, could be really good on the right creature
character-design cards, including rare alternate editions with luxurious elements, highlighting beloved characters