When you see her mandibles vibrate, move to the far edges of the platform. Immediately after the slam, her scythes will be stuck for 3 seconds—this is your window for maximum damage. Phase 3: The Last Stand

Allows you to get in 3-4 hits during the "Scythe Slam" recovery window.

She will leap into the air, casting a shadow on the floor. After a brief delay, she crashes down, creating a shockwave.