[P-026] BlackWarGreymon is a very valuable promo card, not only its main effect but also its price, haha. Its main effect is: You can digi-burst 2, this digimon becomes active again. So normally we will build the digivolution base in the raising areas up-to LV5, then if you have a tamer to secure 3 reset memory when starting of your turn, you can move digimon from raising area to battle, digivolve to LV6 BlackWargreymon and proceed "Security attack". This is better than any LV6 digimon that have <Security Attack+2>, because if opponent use blocker to block, the <Security Attack+x> cannot move on, but BlackWarGreymon can just simply do digi-burst 2 to do another attack.