Shattering Glass

Steela was a general.

Olivia was an engineer.

Both... Look alike?

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Ivor wanted rid of Jesse and Petra for stealing his potion before he created the wither storm. He decided to take his anger out on Olivia, one of Jesse and Petra's closest friends.

King Rash wanted rid of Steela, the general of a band of rebels in the outskirts of Ondern.

Both had a potion, that was supposed to kill the victim. As both potions shattered at the same time, the two swapped places.