Ice Age

As time passed and Rain persisted in his attempts to breach the barrier, a growing sense of concern clouded his mind. Despite his efforts for around ten minutes, the barrier remained as formidable as ever. Its thickness became apparent as he realized he had covered a considerable distance of dozens of kilometers but had barely made a dent in its structure. 

However, after roughly fifteen minutes of continued effort, a slight change became noticeable. The barrier, previously repairing itself swiftly, began to show signs of slowing down itself-restoration process, offering a glimmer of hope amidst Rain's persistent struggle.

At first, Rain only saw hard earth on his path, but soon he began to find stones and rocks as well. It seemed that he was getting closer to the surface. Still, soon things got weird.