So came across the elusive Mysterious Chest in Gardens of Hope 2 in act 4,
a lot of people farm Act 4 - Gardens of Hope 1 for the falcons wings and its rumored that Gardens of Hope 2 ALSO drops these wings, I have now found the chest and can confirm, the 2 people without wings did not get wings from the chest, but we all got a new transmog from Ghoul Kings Blade.