Seeing as magma cubes, a new mob to be added in the full release, look like slimes, hop like slimes, and split like slimes, along with the fact that slimeballs are used for magma cream and that magma cubes can swim in lava... It makes sense, doesn't it?
Being a potion ingredient and an ingredient in getting to the End, it should be rather rare.
[quote=Badgerz]You have to keep in mind that people are stupid.
[quote=Catelite]Just because you don't understand how something works, doesn't make it broken or pointless. >_<