HEAVY SPOILER FOR EP 22 (read if you want)

HEAVY SPOILER AHEAD. READ AT YOUR OWN RISK

Note: These all could be fake, because I haven't seen the episode myself. But, everyone on 4chan and tumblr are talking about it, and people who saw the prescreening of the new ep say it goes like this

HEAVY SPOILER AHEAD LAST WARNING (HUGE PLOT TWIST, SAD STORY)

Chariot used her show to collect magic from people including Diana and Akko, which led to Diana losing her magic as a child and Akko being unable to ride a broom. She tried to use that magic on the moon, so she could absorb the magic from everyone looking at the moon, but something happened and the memory of those who watched her show were altered.

Croix is now using the same method but by collecting negative emotions.

Akko finds out and now she hates Chariot.

The episode is also a cliffhanger. Akko yelling at Ursula for lying to her about everything. Akko is very hurt, she runs away, leaving Ursula. Ursula starts fight with Croix. Ursula gets absorbed into Croix's cubes so we don't know if she's dead or not