There are two main ways to win with this deck. You can either keep attacking your opponent’s security until you can attack directly or mill your opponent’s deck until they run out of cards(Just be careful if your opponent has cards like Scramble or anything else that can return cards from the trash to the deck.)
You can replace BlackGrowlmon with Growlmon X-Antibody (EX-08) if you want. The deck isn’t perfect right now it can brick sometimes but I’ll work on improving it next time if possible
Here are some tips for playing it.
Try to evolve a Growlmon in play into WarGrowlmon (EX-03) and activate its effect. Then play any Guilmon or Takato from your trash or hand. After that, evolve it into Creepymon, use its effect, and then attack. If Creepymon survives and it’s still your turn, you can use Alice, Calling from the Darkness, or other Digimon in play that have Growlmon (EX-03) in its digivolution cards to destroy Creepymon and activate its effect again. You can also use Gallantmon (P-186), but since Creepymon has 12000 DP, you need way to increase it. You can replace current Gigimon with BT2-001 Gigimon, or use Takato (BT21). However, using Takato (BT21) is a bit more complex since it can’t boost Creepymon directly. You need to have ten or more total cards in both player trash, then play Guilmon or evolved any digimon into Growlmon or WarGrowlmon. After that, choose suspend Takato and use it effect on WarGrowlmon that will evolve it into Creepymon its DP will be 14000 then you can use Gallantmon (P-186) Effect