You Shall Not Pass

As an additional cost to cast You Shall Not Pass, sacrifice a creature.
Destroy up to 5 different creatures.
"You cannot pass," he said. The orcs stood still, and a dead silence fell. "I am a servant of the Secret Fire, wielder of the flame of Anor. You cannot pass. The dark fire will not avail you, flame of Udun. Go back to the Shadow! You cannot pass."
- J.R.R. Tolkien, The Lord of the Rings