This card adds a massive amount of attack power during the middle and late game. However, it is not without risks.
One of the best ways to use this, I've found, is with the series 1 and 2 megas that score 300 points when you digivolve to them. It gives them a nice power boost to compete with later megas, and ensures that you have the power to fuel the card.
Combos with other cards:
This is utterly crushing when used with Anubismon. Anubismon's attack power becomes insane.
Ways to counteract it:
Cards like power freeze, option eater, and even steven wreck this card.
Very few options add this much attack power.
The loss of 300 points can be quite devastating, so it is a big gamble.
This card is a mixed bag, but it is extremely fun to play with. I give it 7/10.