Ice

Vera's heart was thudding as they stood there, looking at the majestic dragons right before them. She could not take her eyes off them. Just a few moments ago, the four of them had touched down and landed at the peak of the mountain. Before them was a steep 90-degree incline that resembled a flat wall. That wall was frosted over on the surface which only allowed them to see hints of some dark shadows of certain things that were held immobile within the ice. However, the lower couple of feet towards the ground, the wall had somehow formed sharp and pointed ice spikes, each at least half a person's height in length. This ice spikes ran the entire length of the wall and did not allow anyone to get close to it at all.