This power option tends to win games by itself. The restrictions on it don't really make up for its absurd level of power.
I would ban this card when playing with friends, otherwise it should be a staple in every deck.
Strategies and game play:
One of the meanest things to do with this card is to let your opponents increase their attack power massively and then just play this and win.
Combos with other cards:
There are really no combos needed for this card.
Ways to counteract it:
The best way to defend against it is to have options like even steven, option eater, etc that void cards. That, or have digimon that void all option cards.
I give this card a 10/10 because it is just that strong.