[BT9-067] Raidenmon is a versatile LV6 black Digimon: being able to digivolve from both LV5 and LV6, and also benefits from hard-play.
When played with the accompanying option card [BT9-102] Heavy Machine Digimon's Advance!! (or HMDA) he becomes a 9-cost (having +3 memory from inheriting Fujin, Raijin, and Suijinmons from trash) nuke: with 15000 DP, [De-digivolve], [Rush], and [Blitz], in addition to the slew of effects inherited from Fujin, Raijin, and Suijinmons. This gives him enough firepower to swing at almost any suspended Digimon, and the versatility to de-digivolve your way out of difficult situations (such as Armors, Magnamon-X, Ordinemon, and Mugendramon).
His offensive capabilities are the same when digivolving, but at a measly 1-cost from LV5 or to even regain +1 memory if digivolving from a LV6! (assuming the LV6 trios are readily available in trash) Raidenmon will not need the option card if he digivolves this way.