Really, it's weak?
It is Super-powerful. Use four of these and your opponent is dead. Use this and need only 75 damage to kill your opponent. It is so awesome!
SoD, 3 quanta. stoneskin, 2 quanta. its hard to say how powerful it really is, but many fire cards get more powerful as long, as they are in play. for example fahrenheit and fire lance. burning all your quanta is a huge sacrifice and will probably only be worth it at the beginning of a game.
i dont think there is really a need for this card in the game at the moment (at least not for fire decks), since you can beat survival decks (maximum SoD and Stoneskins + miracles). with the cards, that are already in the game.
but the idea itself is nice.