The Phoenix's Child: A League of Legends Story

Tazzlyn, a strikingly beautiful yet odd-looking vastaya, has arrived to Ionia with only the weapons she wields, the armor covering her body and a heavy bag of dark secrets. The Spirit of The First Lands knows she's a stranger, and it heavies on her; no one has seen a being like her walk the earth or fly the skies. Tazzlyn is a complete stranger to Runeterra, yet she is all too familiar with it. Some spirits from all over the world whisper that she has traveled through time, while others say she has traveled through space. Little to none have sensed her before, and they all feel that Tazzlyn simply just dropped out of the blue.
What is some stranger like her doing here, really? Where did she come from? They all ask the same.