Now coming in many varieties such as fire, ice, poison, etc. They were the easiest for wizards to tamper with, being the simplest beings, and have become far more populous than in previous times, definitely migrating from living only deep underground in the darkness. More appear when you kill them, so watch out.
Rainbow Slime cycle through all the colors, changing its element respective to its color. They are common above ground and underground. When it changes color it gains resistance to the respecting type e.g red is fire resistant.
They are known to be related to the Camouflage Slime.