Dota 2's vengeful spirit.
Another awesome character re-design and lore by valve.
the wings are a symbol of the past of the Skywrath scion, a distant memory of what she should have been, the queen of her people.
Here's the link to the portrait version [link]
"Even the most contented Skywrath is an ill-tempered creature, naturally inclined to seek revenge for the slightest insult. But Vengeful Spirit is the essence of vengeance. Once a proud and savage Skywrath scion, first in succession for the Ghastly Eyrie, a sister's treachery robbed her of her birthright. Snared in a hired assassin's net, she tore free only at the cost of her wings, limping way in the ultimate humiliation: On foot. With her wings shattered, she knew her people would never accept her as ruler; and in the high roost of the Skywrath flock, inaccessible except by winged flight, her sister was untouchable. Unwilling to live as a flightless cripple, and desiring revenge far more than earthly power, the fallen princess drove a bargain with the goddess Avilliva Scree'auk: She surrendered her broken body for an imperishable form of spirit energy, driven by vengeance, capable of doing great damage in the material plane. She may spend eternity flightless, but she will have her revenge."