Mjolnir, Thor's Hammer

Equipped creature has "{1}{r}, {t}, Unattach Toralf's Hammer: It deals 3 damage to any target. Return Toralf's Hammer to its owner's hand."

Equipped creature gets +3/+0 as long as it's legendary.

Equip {1}{r}

"Whosoever holds this hammer if he be worthy shall possess the power of Thor" - Odin