Pinkymod/Chromoslime

The Choroslime is a Hardmode found during the Rain. It jumps at the player to deal contact damage like any other Slime while leaving behind a trail of damaging rainbow crystals.

Bestiary Entry
Slime made of rainbow sludge. Trails behind rainbow droplets that can really hurt. Commonly found during rain. I like to think if slimes stand under rainbows, they turn rainbow. Of course, that's nonsense. Rainbows have no end! Or maybe these are what Slimes shot with rainbow guns become...

As beautiful as they are, they object to being put in lava lamps