My first thought is that I'm not sure how balanced that cost is, so I'll ask a few questions. Well actually, my first thought was that you put Time Quanta as the element, not Time. If you're planning on submitting this to the crucible, that's one thing the curator will ask you to change.
1. Is the attack gain permanent? Does it disappear when the permanent is destroyed, like nightfall?
2. While the wording is slightly ambiguous, did you mean on purpose for it to affect both you and the opponent?
3. Does Adrenaline count every time for this?
4. Does the attack gain happen every turn, thus acting like a constant charger?
Such high DR (Damage Reduction) can be scary.