Machinedramon

ramprecursion

Black Cyborg is a grindy ramp deck: you throw your level-5 Cyborg Digimon into the trash on purpose, then a single Machinedramon scoops five of them back under itself for a huge burst of memory. From there you stack up into the two Chaosdramon megas — one wipes the opponent's board, the X-Antibody version refuses to die and shreds their security every time you try to remove it. You don't kill in one turn; you build an unkillable 13000-power wall and slowly bury their security.