My Thoughts & What I Need

[Phoenix]

To get to Blackwing Lair, and this is just speculation right now, you will need to make a cloak that has a scale of Onyxia.

Actually, Tigole says:
"And to answer the question regarding the key -- No, there is no key to access [Blackwing Lair], although you will have to have access to Upper Blackrock Spire before entering for the first time."