Back story (QUEEN MYCELIA)

A dark and dank estate was overseen by a fearsome noble woman. She craved ever more and more, and had her slaves dig deep into the mountains that bordered her home. Seeking riches within the depths. But when no riches emerged, she became fierce and violent. Demanding harder and harder work. And the slaves dug more. And within the depths of the mountains, they unearthed a horror beyond their comprehension.

The first happening was the growth turning on the manor. Food became poisoned. Vines blocked doors and obscured windows. And spores sprouted everywhere.

Then the slaves became corrupted. Their bodies turned into hosts for parasitic fungus. Long after they died, their bodies shambled around the grounds. It was a menace that could not be controlled.

As the woman's estate fell into chaos, she couldn't bear the shame of seeking help from outsiders. Instead, she went into the mountains herself to uncover the source of this horror that had ruined her.

And there she came across her. At that time, Queen Mycelia was more a collection of fungus in a loose physical form. But when she consumed the noble woman, she altered her own appearance to look like a fearsome female in a gown.

She continued to spread her corruption across the estate. She'd never experienced such growth and such control before. Realizing she could now extend her powers even further and turn more creatures into her slaves, she traveled.

She corrupted each land she crossed, claiming the plants, claiming the people, and leaving behind a trail of fungal rot. She walked both above the earth and below, a female figure in the fog. But any that got too close realized terrors beyond their comprehension.

And finally, her journeys brought Queen Mycelia to the Realm of Silence under Praetoria. Praetoria's trees and roots stretched far down here, she could call out to so many servants. The whole continent could be hers. But why stop there? The Chaos Legion had means to reach even further. One day, the entire Splinterlands would be under her control.
“She is the roots and the trees,
The matriarch of reeds.
The decaying marsh,
With a stinging bite oh so harsh.
She is the eyes of the wood,
And all understood.
Those who walk in her domain, take their last breath.
And all will worship the Queen of Fungus and Death.”

-- Poem of the Sovereign of Silence

Credit to SPLINTERLANDS