[P-016] Diaboromon will have securityattack+x with x is number of Diaboromon on the battle. [BT2-006] Tsumemon will give +2000DP if there is other digimon same name with this digimon, it is a good use for Diaboromon evolution base. The option card, [BT3-105] Power of Breath, is the key element of this deck, casting this option card on [BT2-082] Diaboromon would be a safe solution. With this card, Diaboromon has Reboot, cannot be reduced DP (yellow), cannot be return to hand or deck until opponent next turn. If Green deck rest him and attack him, we can use blocker or other copied Diaboromon to scarify. I have nenver thought of this card when I build Diaboromon deck before, so when I saw it I thought "Wow, this is a good strategy". Diaboromon might not have high DP, but its increasing number of Diaboromon in the field is hard to counter.
If Opponent plays Omegamon or Omegamon Alter-S, then the weakness will be shown. By the way, this deck have potential and fun to play with. It is always fun to play deck with many blockers.