Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Felwood Slime Sample

NPC	Level	Zone	Chance
Cursed Ooze	49 - 50	Felwood	100%
Tainted Ooze	51 - 52	Felwood	100%
The Ongar Rare	51	Felwood	100%