[ST2-09] Zudomon is always the best solution to remove the digivolution source, when digivolved: can remove up to 2 cards in opponent's digimon digivolution source. [BT3-023]Angemon, a LV4 digimon with inheritable effect to remove 1 digivolution source when attacking, I have 2 copies in my deck. And the last one is new digitama from BT04, [BT4-002]Bukamon, but its inheritable effect is limited to opponent LV4 digimon, so I dont put many of these in my deck.
When you play this strategy, opponent will tend to hard-play their digimon to not give blue chance to remove digivolution source. Then this deck also have a method to deal with the digimon without digivolution source.