Wings have 5 different upgrading levels.
In Destiny of Ancient Kingdoms (DOAK) we currently have Lv30 Wings, Lv45 Wings, Lv60 Wings, Lv70 Wings, and Lv80 Wings.
Quality of wings:
There are 5 different wing quality levels. There are white quality, blue quality, purple quality, gold quality and orange quality wings.
How to upgrade wings in Destiny of Ancient Kingdoms?
Wings can be upgraded to higher levels with Wing Feathers, Blood Soul Hearts, and Experience to upgrade them gradually.
How to get wings from Destiny of Ancient Kingdoms?
Wings can be obtained by completing main story tasks.