Rupoor

Rupoors are items from The Legend of Zelda: Phantom Hourglass. They are black Rupees that drain regular Rupees from any person unfortunate enough to pick one up. Large Rupoors will drain 50 Rupees from Link, while small ones will drain 10. They are found in certain areas throughout the World of the Ocean King, although rather infrequently. Whenever Link obtains a Rupoor, he will frown and the item music will become distorted (Similar to the sound made when Linebeck shakes Link when he hands him the key in the Temple of the Ocean King).

On one of the floors of the Ghost Ship, Link discovers two chests, one of which contains a Rupoor. One of the Diabolical Cubus Sisters tells Link to open the left chest, which is the one that contains a Rupoor and summons a reapling. Other ones can be found on Harrow Island, where they are hidden amongst other values of Rupees along with Treasure Charts to try and subtract all your winnings. They are reasonably common on the island. On the Isle of Ruins, Link finds a whole room full of Rupoor's, guarded by Keese, making it difficult to pass.

Etymology
The Rupoor's name is a portmanteau of the words "Rupee" and "Poor". Additionally, the Rupoor was claimed by Shigeru Miyamoto to be the "evilest item in all of Hyrule" in 2007.