Here is my Round 3 entry to the MELO. The category is 'March of the Ents'.
A mob of angry ents wrote:To Isengard! Though Isengard be ringed and barred with doors of stone;
Though Isengard be stong and hard, as cold as stone and bare as bone,
We go, we go, we go to war, to hew the stone and break the door;
For bole and bough are burning now, the furnace roars - we go to war!