The main problem with this is ignoring it with 9...b5 10.Nc3 Ne5! refutes it. If you have to play Nd4 back some moves later then black is already comfortably better.
11.Bf4 d6 12.Ne3 followed by possibly Bg3,Qd4 might be a better pratical try. Although this is good for black as well maybe there is a chance black misplays it.
The Voidstrike Gambit!
Firstly, This Gambit Is Kind Of Rare. But In My Opinion, It Is Overpowered When Used!
Also This Gambit Can Be Used At Any Level Since It Puts Alot Of Pressure On Your Opponent And It Is Not Too Risky!
Also This Gambit Is Made For Advanced Players Not Low Elos