The sheer size of the space. It's so large that you can't even see the edges or

The sheer size of the space. It's so large that you can't even see the edges or the borders of the space. The floor is made of huge mountains, each one rising higher than the next. The mountains are covered in snow and ice and the peaks are dusted with stars. In the center of the domain expansion, you see a giant cosmic purple and pink sun that seems to pulse with an eerie energy. The sun is so bright that you have to shade your eyes to even look at it. The light it gives off is also cosmic, with swirls of strange patterns and colors dancing across the sky. The sky itself is a massive pink and purple expanse, filled with stars and strange clouds that look like they're made of nebulae. The cosmic light permeates the sky and creates a feeling of vastness and grandness that's both awe-inspiring and terrifying.