Abbadomon and a few chunks of metal

All hail Abbadomon Core 

The game plan is to cycle through your deck as efficiently as possibly, playing out your Level 3 and 4s with the reduced cost from Negamon in your raising area.

Scatter mode's <Draw 2/Trash 1> is essential to keep pace with draws, since the deck does not do as much traditional digivolving.

Once the requisite 4 turns have passed -- the Abbadomon needs to land and spawn the Core into Raising, which now becomes a pending threat that can be brought out in response to an

All hail Abbadomon Core 

The game plan is to cycle through your deck as efficiently as possibly, playing out your Level 3 and 4s with the reduced cost from Negamon in your raising area.

Scatter mode's <Draw 2/Trash 1> is essential to keep pace with draws, since the deck does not do as much traditional digivolving.

Once the requisite 4 turns have passed -- the Abbadomon needs to land and spawn the Core into Raising, which now becomes a pending threat that can be brought out in response to an opponent's attack.

If the opponent is stalling, then an attack can be forced using by digivolving into MetalGreymon 

Gennai can be used as an alternative condition for moving out the Core in the event when you don't want to reset your eggs just yet. 

MetalMamemon is a one-off tech that has some interesting applications.