{Lord of Shatterskull Pass} + {Sword of Kaldra}.
Get the Lord up to level 6. Triggered ability kicks in, dealing 6 damage to each creature defending player controls.
If he's equipped with the Sword, he's no longer a 6/6. He's an 11/11 (the Sword giving him +5/+5), and the triggered ability of "whenever equipped creature deals damage to a creature, remove that creature from the game".
Swing with Lord of Shatterskull Pass equipped with Sword of Kaldra.
Deal 6 damage to each creature defending player controls.
Sword of Kaldra's ability kicks in, exiling all damaged creatures.
Lord of Shatterskull Pass deals 11 damage to opponent.
Original post modified to correct mistake. Glad you like it. :D
Reading this, I thought you were going to talk about {ghost prison}