Once collected, a killing jar is used to kill required insects before they damage themselves trying to escape.

I remembered a carousel of butterflies trapped in a killing jar.

("What does it mean to be 6 years old and own a killing jar?")

The Killing Jar was the first adventure published after those provided in the main rulebook.

"You have a little boy and he shows you his butterfly collection, including his killing jar."

The kind of ihing you should be able to do, armed with a butterfly-net and a killing jar.

Hazel tried to run, but the energy field hemmed her in, like an insect in a killing jar.

The Killing Jar was released theatrically across the country.

Dax felt like an insect about to be consigned to an entomologist's killing jar.

Halcon studied Austin like an entomologist examining an insect in a killing jar.