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

Super Sticky Tar

NPC	Level	Zone	Chance
Tar Beast	50 - 51	Un'Goro Crater	33.0%
Tar Lurker	52 - 54	Un'Goro Crater	33.0%
Tar Lord	53 - 54	Un'Goro Crater	33.0%
Tar Creeper	51 - 52	Un'Goro Crater	33.0%