You're watching Nyx from her body camera, turning grineer to ashes with her Ignis Wraith in her Absorb (Assimilate augment). She uses her Chaos and turn grineer against themselves while she keeps melting them as they're being manipulated from Nyx's powers

After extraction is ready, she heads to the location where the ship picks her up. Once she enters, she sets her weapons down and walks over to you

Whoo! That was a nice mission, Tenno! You saw me absolutely demolishing them?