Responses
I think it might have been because of the mirror shard. When the Leila tried to take it from Winter, it got cracked. Since it was containing the Leilas power and probably consciousness, when she tried to use it against Penelope, it finally started to shatter, breaking a part of the Leila's power and consciousness along with it
glad that we're finally coming to an end but i'm still a bit confused on how penelope was able to overcome that leila (i get she died bc she's now a living being)