Helms Deep has but one weakness. Its outer wall is solid rock, but for a small culvert at its base, which is little more than a drain. [Saruman is pouring black powder into a metal container. Gríma approaches, holding a lit candle] How? How can fire undo stone? [Saruman firmly pushes Gríma's candle away.]
If the wall is breached, Helm's Deep will fall.
Even if it is breached, it would take a number beyond reckoning, thousands, to storm the keep.
Tens of thousands.
But my lord, there is no such force! [the two emerge, revealing the ten-thousand strong Uruk-hai army]
[to the army]
A new power is rising! Its victory is at hand! This night, the land will be stained with the blood of Rohan! March to Helm's Deep! Leave none alive! To war! [to Gríma] There will be no dawn for Men.

