The Fried Liver Attack

The Two Knights Defense (1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6) invites White's most notorious club weapon: 4.Ng5!?, attacking f7 twice. If Black defends carelessly, White sacrifices a knight on f7 and drags the king into the center — the FRIED LIVER ATTACK.

You need both halves: the attack (it wins games for years below 1200) and the antidote (so it never wins against YOU).