Pandora's box is an artifact in Greek mythology, taken from the myth of Pandora's creation in Hesiod's Works and Days. The "box" was actually a large jar (πίθος pithos) given to Pandora (Πανδώρα, "all-gifted, all-giving"), which contained all the evils of the world.
Meet pandora's box. Inside has been placed every evil imaginable. There are portals placed inside to parts of hell that no human should witness. This will not go cheaply because of the nature of the jar. To use it DO NOT open. Place a name on a peice of paper, and place it UNDER the vase, knock three times and WALK AWAY FAST. Make sure you know what you are doing because even if you change your mind and rip up the paper, the evils of the world will visit you AND the person you tried to curse. You must leave the paper under the jar for a week then take it out and BURN it.