Classic Era
Noxious Lair Investigation
Level 47
Requires Level 39
Both
Tanaris
You will also receive:
3,150 experience
50s
+75 reputation with Gadgetzan
Forever
Noxious Lair Investigation
Level 47
Requires Level 39
Both
Tanaris
You will also receive:
3,150 experience
50s
+75 reputation with Gadgetzan
No item rewards. In quest chains the rewards usually sit on the final quest — check the chain on Wowhead.