[On Deletion] You may play 1 green level 4 or lower Digimon card with Hybrid in its form from your hand without paying its memory cost
The turn player can choose the order in which to activate the [On Play] effect and any potential [When Attacking] and such effects
However, since your opponent will not enter the Battle Phase if there is already a monster with battle destruction immunity on the field, you need to devise a way to have them enter the Battle Phase early by placing bait they would want to break through in battle, such as Unchained Soul of Rage or Diabellze the Original Sin
That does take mana and jumping ahead doesnt hurt, if your opponent is still playing small creatures
Whenever a land enters the battlefield under your control, search your library for a basic land card and put it in your hand
Then when youre ready to attack, this monster can attack every monster your opponent controls, and inflict burn damage too