MetalGreymon, a LV5 digimon that can be digivolving into black or red color, grants "piercing" for the Digimon that is [Machine] type or [Dragon Kin] type, and has this card in its digivolution source.
For the [DragonKin], we have Wargreymon, VictoryGreymon, BlackWarGreymon. For the [Machine] type, we have Machinedramon.
The EX1 WarGreymon, with 4 costs to digivolve and 12000DP, is not a cheap LV6 to play, but it has "Advance" with "piercing" that inherited from LV5 MetalGreymon, it is easy to execute first attack when it's digivolving and memory is at 1 or more in opponent's side. On top of that, the WarGreymon also destroys 1 opponent's blocker with his "when attacking" effect.