Which Undertale Weapon actually Kills Sans?

** Sans talk is trending. Players keep asking about the real way to beat him in fan projects. ** Which Undertale Weapon actually Kills Sans? is a special knife that bypasses his usual defenses. These items exist in specific mods or fan games, not the original Undertale. ** That tool ignores traditional attack patterns completely. Research shows this weapon breaks his code immunity under rare conditions. Most fans call this the definitive answer. ** Such theories spread fast on Reddit and YouTube. Understanding this mechanic helps explain challenge run creativity inside fanmade content. ** How do you actually get the weapon? You unlock hidden story paths or install specific mod packs. Can this change work in the base game? No, it needs fan expansion.