Helm's Deep, stronghold of Rohan where King Theoden faced-down the armies of Isengard. Personally I found the battle of Helm's Deep to be the most atmosphiric battle in all LOTR movies; the darkness of that night, the wait of armies to arrive and the rain hitting men, elves and Uruk-Hai armors...Everything about that battle was epic.

Resource Pack: Dokucraft: The Saga Continues
Shaders: SEUS

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