Elliot had no desire to kill Freya, as thanks to the help of his godly right eye of wisdom, he had found out that she had another identity besides being an unholy elf that serves the demonic goddess, the spider queen. She was a resistor, just like him, and there was a high chance that she was a spy planted in the army of the spider queen by the high-ups of the resistance organization. As they were on the same side, Killing her was pointless and wrong. The only reason he was taunting her to fight him was to check out her strength and vent his sadistic tendencies. The last part was unnecessary.