Catacombs Sorcerer
These are mummified sorcerers with rotting skin that has started to sprout mushrooms. They stand stiffly with a dagger in one hand and a torch-like staff in the other, and each one hides a withered infant inside its ragged blue robes.
They guard catacombs in the Realm of Shadow: the Fog Rift Catacombs, the Scorpion River Catacombs and the Darklight Catacombs. Their magic is death sorcery built around ghostflame and a pale glintstone.
Drops
Ghost Glovewort [5]
Ghost Glovewort [6]
Weaknesses
Resistances & immunities
How to beat it
They are spellcasters with modest health, so close the distance and pressure them before they can keep throwing ghostflame at you. Be careful: they still carry a dagger for close range.
Even though they look undead, they do not count as Those Who Live in Death, so do not bother with anti-undead tricks like Litany of Proper Death here. There are three variants, so expect a few different spells.