Number one, to weaken your opponent's Digimon and increase your defense, use the black [BT18-063 Beetlemon] and [BT18-067 MetalKabuterimon]
While Doomsday is usually considered more of a 60-card constructed win-condition, its more than capable of getting the job done here too
Vanguard Series 1, 7 x 7 scan of the front of the original uncut sheet
Finally, if you want to rank well and fast, hunt down double copies of both Ash Blossom & Joyous Spring and Maxx 'C', two hand traps that you'll find in nearly every meta deck due to their stalling effects
The other cool part about Jumpstart is that it can give your collection a great foundation when it comes to building Commander decks
You might not build a deck around this cumulative upkeep card specifically, but it slips into your green lands deck at a relatively low cost