Originally, she could only shrink (down to subatomic sizes, if necessary), but after the original Leviathan's death, the Emerald Eye bestowed her with his power to grow to giant sizes as well.
She could only shrink (down to subatomic sizes, if necessary). This is originally. The Emerald Eye bestowed her with his power to grow to giant sizes as well. This was after the original Leviathan's death.