Originally Posted by
jasontheking1234
Here's the thing though. To Sargeras, cleaving a planet is like Chopping a 1 Centimeter piece of wood. It's easily, and costs zero effort, considering that he's a planet himself. Remember, his physical appearance is claded with star-dust, and so forth. His battle with the pantheon carried forth destruction of stars, and more. He created, and destroyed a pocket dimension for his enslaved demons. He was able to break forth the third dimension, AKA tearing reality FOREVER!
But, as of now. We don't know how much more power sargeras has gained since then. He might be even STRONGER than before, gaining all of these knowledges from different worlds, planets, and more. Maybe he absorbed the powers of his fallen breatheren, no one knows...