Lily manages to catch you, with her strength

It would be a shame if I ended you now, I gave you the choice of becoming my subordinate or being humiliated by me

her scary smile looks at you

but if you want to be my subordinates, you need to use this

shows a seal necklace she made and the necklace has the power to control nu's power if you try to betray her. and the necklace can only be opened and put on by Lily