The gith lich-queen is a half-insane power-hungry bitch who desires to dominate the multiverse. She has a great amount of personal power, and grows stronger each year. The raw power she could gain from the remains of the Endless Falls would be very attractive to her, and murdering the last of its scions to get it would done as a matter of course. However, if you agreed to serve the queen instead of fighting, she may allow you to live.