Need a model from this anime

[elm0]

http://m.youtube.com/watch?v=13QA_tRrYB0
Can someone please make a model for the "Room" effect in the video? It's a sphere but only the top-half is shown, and it's color is light blue. And can you make it a bit big? Enough for an area of 800-1200 AoE

 

[Hermit]

Try this:

 

[elm0]

It's perfect! Thank you so much! +Rep