Warning!

She may hold the key to reversing the Venin corruption.

This, along withViolet finding Xaden inEmpyreanbook 4, could be a major plot point.

Fourth Wing imagery

With herunique ability to siphon magic, the potential is palpable.

However, there are other possibilities to consider.

Perhaps Sloane’s siphon alone isn’t enough.

Fourth Wing and Onyx Storm by Rebecca Yarros against a red background with dots of other colors in it

It might require acombination of her ability and a mender’s touchto fully restore the earth.

If this manifests, it could be the key to a complete cure when combined with her siphoning.

If siphoning and mending are the key combination, Sloane could be instrumental in curing Xaden.

The cover of Onyx Storm by Rebecca Yarros with the cover of Fourth Wing as the background

This would be very touching,considering how much Xaden did to help the marked onesafter the rebellion.

There are other ways Liams protective legacy could inform the cure.

However, a counter-theory emerges, suggesting Brennan himself might be affected by Venin.

The covers of Fourth Wing, Onyx Storm, Iron Flame by Rebecca Yarros in front of a purple, white, and gold background

Sloane’s signet is not just a power, but a critical tool in understanding the Venin…

Onyx Storm Book Cover

Violet Sorrengail faces new political intrigue and battles old enemies while uncovering the secrets of her second signet. As she strives to save Xaden from venin corruption, her relationships with allies and dragons are tested, leading to intense confrontations and unexpected revelations in a world of dragons and magic​.

Onyx Storm