If you only want a sphere shape

[![enter image description here][1]][1]

 - Start with the cube.  Ooops. Barely visible under menu.
 - Edit Mode subdivide some reasonable number, perhaps 3 or 5, for vertex density and cpu efficiency
 - Edit Mode To Sphere (Not Modifier). Menu Selection and Keystroke is in the image above.
 - Consider Shape Keys

 - There are always may ways to produce similar creations in Blender

[![enter image description here][2]][2]

Image above shows the high density cube transformed to sphere shape.  Well maybe not so high density.
You might start with sphere and then use shape keys to add spikes.



  [1]: https://i.sstatic.net/NKPpx.png
  [2]: https://i.sstatic.net/zcUNV.png