Silver bullets work when the creature is vulnerable to silver. They are not a universal monster round, which makes correct identification every bit as important as the shot itself.

The rawhead trap turns water and a powerful electrical current into a killing method. It works, but Dean nearly dies in the same circuit. Effective does not mean safe.

Consecrated wrought-iron rounds can kill a shtriga only while it is feeding. Outside that narrow window, the same ammunition may do nothing at all.

Dead man's blood on a crossbow bolt incapacitates a vampire long enough for capture or decapitation. The blood is the active countermeasure; the bolt is the delivery system.

Iron tools disrupt ghosts and can hurt or block several other supernatural beings. A fireplace poker or crowbar may look improvised, but the material is doing the real work.

A devil's trap does not kill a demon. It contains one. As long as the symbol remains intact, most demons cannot cross its boundary and lose access to many of their powers. Break one line, however, and the…

Ruby's demon-killing knife gave the Winchesters a way to kill most demons permanently, but every use carries rules and consequences. It usually kills the possessed vessel, fails against the strongest classes of demons, and cannot kill angels or…

Samuel Colt built this supernatural revolver in 1835 and made thirteen original bullets for it. The Colt can kill most supernatural beings and unlock the Devil's Gate, but Lucifer confirms that five things are beyond its power. The…