Sauron the Deceiver

Indestructible, menace.
When Sauron enters the battlefield, for each opponent, gain control of target artifact or creature that player controls or in that player's graveyard until Sauron leaves play. When Sauron leaves play, sacrifice all permanents you control but don't own. Those card's controllers each get a curse counter that has "At the beginning of your upkeep, you lose 3 life."