legendary duelists ancient millennium booster box Yu-Gi-Oh: His powerful Barrel Dragon nearly knocked Joey out of the tournament Legendary Duelists Ancient Millennium Booster

The defining strength here is repeatable card advantage from the command zone

His Venusaur only knows Grass-type attacks, so anything with a 4x resistance to it will do Charizard, Skarmory, Dragonite, Crobat, and so on

Card Text 2 [Inherited Effect] Piercing (When this Digimon attacks and deletes your opponent's Digimon in battle, it checks security before the attack ends.) Notes Welcome Tamers Pack ST20-09 U Digimon Lv.5 Alternative Art MegaKabuterimon Color Green Cost 7 DP 7000 Digivolve Cost 1 Green from Lv.4 Form Ultimate Attribute Vaccine Type Insectoid/ADVENTURE Card Text 1 [Special Digivolution Condition] [Digivolve] Lv.4 w/[ADVENTURE] trait: Cost 3 [Effect] [On Play] [When Digivolving] 1 of your Digimon unsuspends

Credit: Wizards of the Coast Zimone, Paradox Sculptor Marcy: Another very well costed 4 CMC creature, and the doubling ability is very nice