{R} Mjolnir, Storm Hammer (Extended Art) [Assassin's Creed][ACR 170]

When Mjölnir enters the battlefield, attach it to target legendary creature you control.
Whenever equipped creature attacks, tap target creature defending player controls and put a stun counter on it. Then Mjölnir deals damage to each opponent equal to the number of tapped creatures that opponent controls.
Equip {4}