elf arrow

noun3

1. •
   A magical arrow (weapon) used by elves or other mythological beings.

   • When they want beef or mutton on any festal occasion, they betake themselves to the Shetlanders' scatholds or townmails, and with elf-arrows bring down their game. — 1828
2. •
   A prehistoric flint arrowhead.
3. •
   An elf-bolt or belemnite.