Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello,

I've been researching blacksmithing a bit, and stumbled over this quest that gives an excellent pvp trinket. Googling around it gives various answers on what the minimum lvl req is to start the quest. Some sites say 35, others lvl 40. Can anyone confirm any of these levels?

//Helios

Level 40.

How does this item work?

From the text it reads as if it works like a potion, giving you immunity to fear for 30 seconds.