Immovable Rod [Dungeons & Dragons: Adventures in the Forgotten Realms Commander]

Set: Dungeons & Dragons: Adventures in the Forgotten Realms Commander Type: Artifact Rarity: Rare Cost: {W} You may choose not to untap Immovable Rod during your untap step.Whenever Immovable Rod becomes untapped, venture into the dungeon.{3}{W}, {T}: For as long as Immovable Rod remains tapped, another target permanent loses all abilities and can't attack or block.