Rather than just spawning at the surface of lava, Magma Cubes should spawn in the lava and rise to the top instead.

As it currently stands, the way that Magma Cubes spawn in lava oceans is that they spawn on the surface. What if instead they spawned deep in the lava oceans, and rose to the top insetad. This would be a cool visual effect, as well as potentially providing a bit of a surprise when the magma cubes emerge- players would get a little surprise when they see a new hostile mob that they have to face that they weren't expecting!

This would be a very subtle change, but it would be neat to see magma cubes emerging from lava, for the visual effects and for the surprise players would get when they see a new hostile mob they have to face.