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.

Just like many other slimes, Illuminant Slimes become passive around the player when they have the Royal Gel accessory equipped.

Tips

 * An easy way for early Hardmode players to defeat these is to lure them into lava, e.g. by grappling to a block above a pool of lava.

History
Gelée lumineuse 발광 슬라임 夜明史莱姆