Magical Girl Tsubame: I Will (Not) Save The World!

Hi. I'm new to this community and I need help writing a plot for a story I'm creating. It's a magical girl story that takes place in an intergalactic war that needs to involve witches as the antagonists and the protagonists (not the main characters). I need conflict. The reward for the best conflict prologue plot for my story will get a dedication on my chapter that only be seen on Wattpad. The contest is from 8/30 - 9/7. Take your time and try to stick to the motive. Thanks.

I am reading I'm A Zombie But I Want To Save The World at Manga Dogs I'm A Zombie But I Want To Save The World https://www.niadd.com/original/10064425.html

This is not mine but i love the whole vibe of the girl what do u all think?

Hello I'new here !And I 'a Chinese girl ,My English is not good .

Скриншоты из аниме: "Сайт девочек-волшебниц".
Screenshots from anime: "Magical girl site".