Sierra panted heavily as she laid against the stone wall of the tunnel she had forged using her ice powers. She was depleted of energy, but was quite pleased with how it had turned out. It was tall enough for Casimir, perhaps one to two feet taller than him, and wide enough for that their wings could fit. Her only complaint was the rough walls, along with the wind that flew into the tunnel. After she caught her breath a few minutes later, along with her energy, she covered the exit with snow and began chiseling the walls, finishing the tunnel entirely, floor, ceiling, and walls about half an hour later. She walked back up the tunnel towards the main cave area, where she intended to chisel the floor some to make it even, along with the walls.