The Battle of Couples
Previously when Freya and Claudia faced off against one another, they were both cautious in their approach as they tested out the powers of one another. In their first encounter with one another, Claudia surprised Freya with her heat and how it interacts with the strands of light of Freya's.
Then, in the second fight, Freya's Valkyrie's Prison fought against Claudia's Inferno domain, with Claudia hesitating to use her domain initially due to the unknown of Valkyrie's Prison. She held back, endured Freya's attack until the last possible moment.
That was when she activated her Escalation 3, Heat Death, matching Freya's own Escalation 3: Valkyrie's Palace. Their final clashed knocked both of them out of commission, though that was when Bones defeated Keeno and took her away.