Outlander

It takes all day for the preparations to be complete. As the sun begins to set, you hear the sound of a goblin horde in the distance. You hurry in the gates and reach the top of the wall to confirm your assumptions. Thousands of invaders are marching on the castle, you can see the ivory shine of their teeth in the torchlight. The Horsemaster ordered his troops to begin firing arrows, but only at point more than fifty paces from the wall. At first, the goblins seemed encouraged by this as dozens begin to climb the walls in earnest; passing their companies who fall in the field behind them. But you and the Horsemaster have a plan. as soon as the first goblins reach up over the edge, you whisper the Word that causes a small flame to dance on you fingertips. You reach over the wall and touch the shimmering surface
Immediately, the wall becomes engulfed in flame. The oil that you and Merida poured on the stone does its job perfectly. All of the climbing goblins fell to their death and then your soldiers pressed their advantage. The Falcons man catapults and rain stone upon the invaders. The bowmen fire relentlessly. Horsemen storm through the gates behind Merida and chase down the stunned goblins on foot.
"Back you beasts!" you suddenly hear. It sounds like the Horsemaster is battling goblins on the wall. He may need your help, but can you abandon your post this close to victory?