Immovable Rod 7 (Commander: Adventures in the Forgotten Realms)

You may choose not to untap this artifact during your untap step. Whenever this artifact becomes untapped, venture into the dungeon. {3}{W}, {T}: For as long as this artifact remains tapped, another target permanent loses all abilities and can't attack or block.

NM - $1.50
LP - $1.50
MP - $1.50
HP - $1.50
DMG - $1.50