The avatar of the king

A female character with purple hair stands on a glowing platform, holding a red staff as a swirling vortex of blue and pink energy forms behind her; she then appears within the vortex, confronting a massive, glowing blue demonic face with sharp teeth and glowing eyes, before being launched into the air as a large, serpentine creature with a red body and glowing white eyes emerges from the vortex.