Wedding Ring of Death

The Wedding Ring is an artifact used by the Pillar Men to plant a venom inside a human. In Part 2, Wamuu and Esidisi used this rings to prevent JoJo from escaping his fight with them.

About
The ring has some sort of timed action since the venom won't activate until the needed time passes. The ability from Pillar Men to pass through human bodies without damaging them, allows the rings to be placed on different organs.

Trivia

 * Esidisi ask Kars if he wanted to put a wedding ring on Joseph, impling he has that artifact too.
 * Apparently, it was common Wham did this trick on others.