This card is not a denial card but works nicely in combination with them. It is indeed very interesting. As avantasia said in the notes, to play this card after you rewind a dragon at the right moment (when the quanta pool is empty) would force your opponent to discard it. It is just great.
However, the name is not very good - an epic mechanic need an epic name. I am not sure about the element either. It might be better in an element which doesn't already have a denial card (with a cost reduction). Denial cards are Black Hole (
![Gravity :gravity](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/gravity18x18.png)
), Reverse Time (
![Time :time](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/time18x18.png)
), Earthquake (
![Earth :earth](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/earth18x18.png)
), Trident (
![Water :water](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/water18x18.png)
), Discord (
![Entropy :entropy](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/entropy18x18.png)
), Silence (
![Aether :aether](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/aether18x18.png)
), Devourer (
![Darkness :darkness](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/darkness18x18.png)
) and Nightmare (
![Darkness :darkness](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/darkness18x18.png)
). Air, Death, Fire, Life and Light do not have denial cards. Fire has a lot of spells (5) and Light (18) and Death (19) a lot of cards (also I don't think it could fit thematically). In the remaining elements, a life or an air version could be called "impulse" or "spur".
Concerning the art, here is a royalty free suggestion fitting for both air and Life :
http://www.sxc.hu/photo/1240013 .
Good work man. I hope this will go far ...