Just a note,
From a purely mathematical point of view this card will have the greatest effect for creatures and damage sources that do low damage. E.g. the lower the damage done, the bigger bump it will get. E.g. 1 pt sources are doubled, 2 pt sources increase 50%, 4 pt gain +25% etc. So this will do relatively little for heavy hitters (dragons, etc.) and will make small cards much nastier (deja-vu, fractal photons, etc).
Lastly, just to clarify, will the extra damage be added before or after shield effects.
I.e. if enemy has the shield card out (absorbs 1 damage) and i attack with a photon, will the photon get +1 and go through or will it get blocked entirely and thus do no damage at all?
On a similar note, Will the damage added be added before or after calculating number of attacks with adrenaline. E.g. does my frog still get 4 attacks or is it dropped to 3 attacks?