Illuminant Slime

Illuminant Slimes are Hardmode enemies that spawn in the Underground Hallow biome. They replace normal cave Slimes (Black and Mother Slimes) in most cases. These slimes deal a large amount of damage and have more health than their Cavern counterparts. As suggested in their names, these slimes give off a small amount of light. Illuminant Slimes also leave an after-image like the Chaos Elemental and Illuminant Bat, which appears as a long, pink trail.

Illuminant Slimes are immune to the Poisoned, On Fire!, Shadowflame, Venom, and Cursed Inferno Debuffs.

Tips

 * An easy way for early Hardmode players to defeat these is to grapple to a block above lava, then wait for the slime to jump in, then leaving you to only fend off the Illuminant Bats. The Souls of Light will not burn.
 * Royal Gel can be another valuable item, as they won't even bother you, allowing you to easily defeat them.

History
夜明史莱姆 발광 슬라임