This card is fine: it is balanced because it is as good as it is dangerous. Using this card is risky: if you aren't in control, or do not have virtually limitless reserves of entropy/random quanta, then it is a useless card. Against cards like andrenaline, dissapation shield is useless. Conversely, big powerful creatures absolutely destroy dissapation field. When this card is destroyed, all your [entropy] quanta is gone. That means it's a double edged sword, as you are deadlocked when the card disappears.