Beginner Red Deck

WarGreymon

Basic 1 stack deck were you digivolve up and up into your level 5 or 6 digimon and then start swinging at security

Win Con: Attack security when you're at lvl 5 or lvl 6 digimon stack with 1 or huge attack checking multiple security cards per attack.

Key Things:

Greymon X: Has an inherit that prevents it's removal by being returned from the field to the hand or from the field to the bottom of the deck by trashing 2 sources of the same level

Alt Digivolve Requirements: Alt digivolve refers

WarGreymon

Basic 1 stack deck were you digivolve up and up into your level 5 or 6 digimon and then start swinging at security

Win Con: Attack security when you're at lvl 5 or lvl 6 digimon stack with 1 or huge attack checking multiple security cards per attack.

Key Things:

Greymon X: Has an inherit that prevents it's removal by being returned from the field to the hand or from the field to the bottom of the deck by trashing 2 sources of the same level

Alt Digivolve Requirements: Alt digivolve refers to the black text below where the digivolve cost of a digimon but above the digimon main effect text is. BT12 Agumon for example, you are able to digivolve off of a Koromon for 0 instead of a lvl 2 black digimon for 1. This is important because unlike normal digivolve requirements, alt digivolve requirements are able to ignore color, so BT12 Agumon, even though it can only digivolve off of black lvl 2 digimon, it can use it's alt digivolve to digivolve off of a red koromon for free.

Raid: Lets you redirect your attack on either security or a suspended digimon, and redirect your attack towards a unsuspended digimon with the Highest DP

WarGreymon: Boss Monster -  BT12 WarGreymon lets you use Raid into your opponen'ts Digimon, combine this with BT12 MetalGreymon inherit of Piercing and you'll be able to delete their digimon and check security at the same time.

Feel Free to Edit the deck to your preference. Greymon decks are considered as the most customizble deck due to the sheer amount of support it gets.