This is an excerpt from my Fantasy book end of chapter 7 beginning of chapter 8.

‘Up and at them,’ Janalyn cried. ‘Get those gourds flying, aiming for the base of the overhanging ice, and as far up the slope behind the giants as you can get them. Krystabel, Bristynn, Penipol, we must start sending the fireballs over. The giants are hard to see, but if you watch for movement, you should be able to hit them. Archers, ready your fire arrows and fire when ready, aiming at the overhang, the slope, and the giants. And, everyone, be careful not to expose yourselves too much. The shards of the icicles and snow boulders can do serious damage. May all the good spirits be with us, and steady our hands.’

With that the battle started in earnest. Soon fire was flying one way across the pass, while giant icicles and snow boulders were flying the other. Krystabel had never used magic so intensely, or so constantly, so she lost all track of what was happening around her in her deep concentration. She knew that she had hit one of the largest giants twice, because the eagles kept her informed. She was faintly aware of cries of pain, when someone was struck by flying shards, but it barely registered in her mind.

Time went by, fire and ice flying through the air, and the sun appeared over the mountain at their back. They could clearly see the damage to the snow-pack on the other side, and the Frost Giants were more apparent with the sun glittering off them as they moved. On the battle went, Janeldra and Tineslinn moving quickly to get the wounded into the shelter where they could be cared for.

‘One of the largest giants is seriously wounded, and is standing near the edge of the overhang’ Krystabel informed Janalyn. ‘The eagles tell me that the surface of the ice pack behind the giants is starting to melt and move down towards the drop-off. They can see the smaller giants starting to edge around the soft area, heading up a path around the peak. One of the larger giants is trying to get to the injured one, who is waving him off. …. Oh, there goes the overhanging ice, and a whole section of the ice-pack is moving more rapidly now.’

Everyone withheld their weapons, and watched as the huge overhang broke off, and fell to shatter in the pass. With it went the injured giant, barely seen, to crash and shatter, too. Then the moving avalanche of frozen snow-pack reached the edge of the cliff and followed, filling the pass to a depth of several feet. For moments, the watchers stared, shocked at the sudden end to the battle. Then Janalyn stirred.

‘Everyone! Send all the gourds, as many fireballs as you can manage, and the rest of the fire arrows down into that blockage. We must melt it, and clear the way so we can continue on. It will make a formidable flood, but fortunately, most of the water will spill over the cliff where the road makes that sharp bend, and only a few trees will be damaged. The camp is high enough to be safe, I hope.’

They bombarded the huge pile of shattered ice and snow, and eventually it started melting and pouring away down the road. The noise, even from their height, was almost deafening. Then all the fire weapons were used, and they sat and watched the huge wave of water and chunks of ice as it thundered away and out of sight, but not out of hearing.