The core of ancient ice is sealed in Sylvia Frostheart's body, which is evidence of Lissandra's deal with the void.
During her escape, she was pursued by both Frost Guards and Void Creatures, and she rescued the Avarosan warriors in an avalanche.
The tribal princess Sejuani took her in, but attracted the Frost Guard to siege the city.
When Lissandra's envoy threatens to massacre the city, Sylvia decides to sacrifice herself in exchange for Avarosa's safety.
The moment he handed over the core, a rift in the void suddenly tore through the sky.
The envoy screamed in horror: "Deal is done?!"
The remaining perfect ice in Sylvia's body exploded, freezing the incoming void claws.
She turned around to face the rift: "It's not certain who will devour whom."
