The Indian Defense Medusa Gambit is audacious and tricky due to its rarity. Francesco Cavicchi has won several games with it as Black after 1.d4 Nf6 2.c4 g5. If White avoids doubled e-pawns by 5.Bxe5 (5.dxe5 is better), Black gains play against White’s king.
You might like my 100 recent wins in 10 moves or less:
sigvedyrhovden (1975) – Cavicchi (2045), Rated Correspondence lichess.org, 06.03.2022 begins
1.d4 Nf6 2.c4 g5 3.Bxg5 [3.Nc3 is good.]
3...Ne4 4.Bf4 e5 5.Bxe5 [Risky. Safer is 5.dxe5 Bb4+ 6.Nd2 f6 7.Ngf3. Black regains only one of the two gambit pawns. White should beat back the attack.]
5...Bb4+ 6.Nc3 Nxc3 7.Qb3 Nd5+ 8.Kd1 Nf6 9.Qxb4 Nc6 10.Qc3 Nxe5 11.dxe5 Ne4 12.Qd4 d5 13.cxd5 [Correct is 13.exd6 Qxd6 14.Qxd6 Nxd6 15.e3 when White's two extra pawns compensate for not being able to castle.]
13...Nxf2+ 14.Qxf2 Qxd5+ 15.Kc1 Qc4+ 16.Kb1 [This loses. Better is 16.Kd2 Qd5+ 17.Kc3 Qc6+ 18.Kd3 Qb5+ 19.Kc2 Qc4+ 20.Kd1=]
16...Qe4+ 17.Kc1 Bf5 18.e3 0–0–0 19.Nf3 Qc6+ [White resigns.] 0–1