Falcon Wings is a cosmetic item in Diablo 3 that drops from a randomly generated
Mysterious Chest on the map Gardens of Hope Tier 1, Act 4.
It took my friend 8 restarts to spawn the chest. Through persistance and patience I found it on the 64th run! FINALLY!!!
This is the item's appearance in your inventory.
I was getting pretty tired at this point, but now that I have it I can be satisfied that the grind was not a waste of time/effort.