Palantír of Orthanc (M 247 LTR)

At the beginning of your end step, put an influence counter on Palantír of Orthanc and scry 2. Then target opponent may have you draw a card. If that player doesn't, you mill X cards, where X is the number of influence counters on Palantír of Orthanc, and that player loses life equal to the total mana value of those cards.

mythic
Legendary Artifact
From the Magic: The Gathering set The Lord of the Rings: Tales of Middle-earth.