Oh fuck you Medea nobody wants to go to war
And finally we have our explanation. So it seems everyone knows the Arabella has to seal the plague
But, the danger to Leslie here is the possibility someone might use the chains on her
Considering most Arabella's were normal kids though, I'd have thought that you didn't need shadow powers to do the sealing normally.
But perhaps normally you'd have a priest helping you - which, due to Medea's meddling, may not be there for Leslie.
So with Leslie being chained as well as no priest to help, then yeah she might be in danger